CVE-2026-78669 (GCVE-0-2026-78669)
Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-09 16:32
VLAI
EPSS
VEX
Title
Excessive CPU consumption from repeated initial window changes in net/http
Summary
A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 16:32 UTC
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Go standard library | net/http |
Affected:
0 , < 1.26.9
(semver)
|
guessed | |
| Go standard library | net/http/internal/http2 |
Affected:
1.27.0-0 , < 1.27.2
(semver)
|
guessed | |
| golang.org/x/net | golang.org/x/net/http2 |
Affected:
0 , < 0.60.0
(semver)
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-78669",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-09T16:32:53.872432Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-405",
"description": "CWE-405 Asymmetric Resource Consumption (Amplification)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-09T16:32:57.198Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net/http",
"product": "net/http",
"programRoutines": [
{
"name": "http2outflow.add"
},
{
"name": "http2outflow.available"
},
{
"name": "http2outflow.setConnFlow"
},
{
"name": "http2outflow.take"
},
{
"name": "http2Server.serveConn"
},
{
"name": "http2serverConn.newStream"
},
{
"name": "http2serverConn.processSettingInitialWindowSize"
},
{
"name": "http2serverConn.processWindowUpdate"
},
{
"name": "http2serverConn.scheduleFrameWrite"
},
{
"name": "http2ClientConn.addStreamLocked"
},
{
"name": "http2Transport.newClientConn"
},
{
"name": "http2clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "http2clientConnReadLoop.processWindowUpdate"
},
{
"name": "http2clientConnReadLoop.streamByID"
},
{
"name": "http2clientStream.awaitFlowControl"
},
{
"name": "http2clientStream.cleanupWriteRequest"
},
{
"name": "http2FrameWriteRequest.Consume"
},
{
"name": "CanonicalHeaderKey"
},
{
"name": "Client.CloseIdleConnections"
},
{
"name": "Client.Do"
},
{
"name": "Client.Get"
},
{
"name": "Client.Head"
},
{
"name": "Client.Post"
},
{
"name": "Client.PostForm"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "Cookie.String"
},
{
"name": "Cookie.Valid"
},
{
"name": "CrossOriginProtection.AddInsecureBypassPattern"
},
{
"name": "CrossOriginProtection.AddTrustedOrigin"
},
{
"name": "CrossOriginProtection.Check"
},
{
"name": "Dir.Open"
},
{
"name": "Error"
},
{
"name": "Get"
},
{
"name": "Handle"
},
{
"name": "HandleFunc"
},
{
"name": "HandlerFunc.ServeHTTP"
},
{
"name": "Head"
},
{
"name": "Header.Add"
},
{
"name": "Header.Del"
},
{
"name": "Header.Get"
},
{
"name": "Header.Set"
},
{
"name": "Header.Values"
},
{
"name": "Header.Write"
},
{
"name": "Header.WriteSubset"
},
{
"name": "ListenAndServe"
},
{
"name": "ListenAndServeTLS"
},
{
"name": "NewRequest"
},
{
"name": "NewRequestWithContext"
},
{
"name": "NotFound"
},
{
"name": "ParseCookie"
},
{
"name": "ParseSetCookie"
},
{
"name": "ParseTime"
},
{
"name": "Post"
},
{
"name": "PostForm"
},
{
"name": "ProxyFromEnvironment"
},
{
"name": "ReadRequest"
},
{
"name": "ReadResponse"
},
{
"name": "Redirect"
},
{
"name": "Request.AddCookie"
},
{
"name": "Request.BasicAuth"
},
{
"name": "Request.Cookie"
},
{
"name": "Request.Cookies"
},
{
"name": "Request.CookiesNamed"
},
{
"name": "Request.FormFile"
},
{
"name": "Request.FormValue"
},
{
"name": "Request.MultipartReader"
},
{
"name": "Request.ParseForm"
},
{
"name": "Request.ParseMultipartForm"
},
{
"name": "Request.PostFormValue"
},
{
"name": "Request.Referer"
},
{
"name": "Request.SetBasicAuth"
},
{
"name": "Request.UserAgent"
},
{
"name": "Request.Write"
},
{
"name": "Request.WriteProxy"
},
{
"name": "Response.Cookies"
},
{
"name": "Response.Location"
},
{
"name": "Response.Write"
},
{
"name": "ResponseController.EnableFullDuplex"
},
{
"name": "ResponseController.Flush"
},
{
"name": "ResponseController.Hijack"
},
{
"name": "ResponseController.SetReadDeadline"
},
{
"name": "ResponseController.SetWriteDeadline"
},
{
"name": "Serve"
},
{
"name": "ServeContent"
},
{
"name": "ServeFile"
},
{
"name": "ServeFileFS"
},
{
"name": "ServeMux.Handle"
},
{
"name": "ServeMux.HandleFunc"
},
{
"name": "ServeMux.ServeHTTP"
},
{
"name": "ServeTLS"
},
{
"name": "Server.Close"
},
{
"name": "Server.ListenAndServe"
},
{
"name": "Server.ListenAndServeTLS"
},
{
"name": "Server.Serve"
},
{
"name": "Server.ServeTLS"
},
{
"name": "Server.SetKeepAlivesEnabled"
},
{
"name": "Server.Shutdown"
},
{
"name": "SetCookie"
},
{
"name": "Transport.CancelRequest"
},
{
"name": "Transport.Clone"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "body.Close"
},
{
"name": "body.Read"
},
{
"name": "bodyEOFSignal.Close"
},
{
"name": "bodyEOFSignal.Read"
},
{
"name": "bodyLocked.Read"
},
{
"name": "bufioFlushWriter.Write"
},
{
"name": "cancelTimerBody.Close"
},
{
"name": "cancelTimerBody.Read"
},
{
"name": "checkConnErrorWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "connReader.Read"
},
{
"name": "connectMethodKey.String"
},
{
"name": "expectContinueReader.Close"
},
{
"name": "expectContinueReader.Read"
},
{
"name": "extraHeader.Write"
},
{
"name": "fileHandler.ServeHTTP"
},
{
"name": "fileTransport.RoundTrip"
},
{
"name": "globalOptionsHandler.ServeHTTP"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "http1ClientConn.Close"
},
{
"name": "http1ClientConn.RoundTrip"
},
{
"name": "http2ClientConn.Close"
},
{
"name": "http2ClientConn.Ping"
},
{
"name": "http2ClientConn.RoundTrip"
},
{
"name": "http2ClientConn.Shutdown"
},
{
"name": "http2ConnectionError.Error"
},
{
"name": "http2ErrCode.String"
},
{
"name": "http2FrameHeader.String"
},
{
"name": "http2FrameType.String"
},
{
"name": "http2FrameWriteRequest.String"
},
{
"name": "http2Framer.ReadFrame"
},
{
"name": "http2Framer.ReadFrameForHeader"
},
{
"name": "http2Framer.ReadFrameHeader"
},
{
"name": "http2Framer.WriteContinuation"
},
{
"name": "http2Framer.WriteData"
},
{
"name": "http2Framer.WriteDataPadded"
},
{
"name": "http2Framer.WriteGoAway"
},
{
"name": "http2Framer.WriteHeaders"
},
{
"name": "http2Framer.WritePing"
},
{
"name": "http2Framer.WritePriority"
},
{
"name": "http2Framer.WritePushPromise"
},
{
"name": "http2Framer.WriteRSTStream"
},
{
"name": "http2Framer.WriteRawFrame"
},
{
"name": "http2Framer.WriteSettings"
},
{
"name": "http2Framer.WriteSettingsAck"
},
{
"name": "http2Framer.WriteWindowUpdate"
},
{
"name": "http2GoAwayError.Error"
},
{
"name": "http2Server.ServeConn"
},
{
"name": "http2Setting.String"
},
{
"name": "http2SettingID.String"
},
{
"name": "http2SettingsFrame.ForeachSetting"
},
{
"name": "http2StreamError.Error"
},
{
"name": "http2Transport.CloseIdleConnections"
},
{
"name": "http2Transport.NewClientConn"
},
{
"name": "http2Transport.RoundTrip"
},
{
"name": "http2Transport.RoundTripOpt"
},
{
"name": "http2bufferedWriter.Flush"
},
{
"name": "http2bufferedWriter.Write"
},
{
"name": "http2bufferedWriterTimeoutWriter.Write"
},
{
"name": "http2chunkWriter.Write"
},
{
"name": "http2clientConnPool.GetClientConn"
},
{
"name": "http2connError.Error"
},
{
"name": "http2dataBuffer.Read"
},
{
"name": "http2duplicatePseudoHeaderError.Error"
},
{
"name": "http2gzipReader.Close"
},
{
"name": "http2gzipReader.Read"
},
{
"name": "http2headerFieldNameError.Error"
},
{
"name": "http2headerFieldValueError.Error"
},
{
"name": "http2netHTTPClientConn.Close"
},
{
"name": "http2netHTTPClientConn.RoundTrip"
},
{
"name": "http2noDialClientConnPool.GetClientConn"
},
{
"name": "http2noDialH2RoundTripper.NewClientConn"
},
{
"name": "http2noDialH2RoundTripper.RoundTrip"
},
{
"name": "http2pipe.Read"
},
{
"name": "http2priorityWriteSchedulerRFC7540.CloseStream"
},
{
"name": "http2priorityWriteSchedulerRFC7540.OpenStream"
},
{
"name": "http2priorityWriteSchedulerRFC7540.Pop"
},
{
"name": "http2priorityWriteSchedulerRFC9218.OpenStream"
},
{
"name": "http2priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "http2pseudoHeaderError.Error"
},
{
"name": "http2randomWriteScheduler.Pop"
},
{
"name": "http2requestBody.Close"
},
{
"name": "http2requestBody.Read"
},
{
"name": "http2responseWriter.Flush"
},
{
"name": "http2responseWriter.FlushError"
},
{
"name": "http2responseWriter.Push"
},
{
"name": "http2responseWriter.SetReadDeadline"
},
{
"name": "http2responseWriter.SetWriteDeadline"
},
{
"name": "http2responseWriter.Write"
},
{
"name": "http2responseWriter.WriteHeader"
},
{
"name": "http2responseWriter.WriteString"
},
{
"name": "http2roundRobinWriteScheduler.OpenStream"
},
{
"name": "http2roundRobinWriteScheduler.Pop"
},
{
"name": "http2serverConn.CloseConn"
},
{
"name": "http2serverConn.Flush"
},
{
"name": "http2stickyErrWriter.Write"
},
{
"name": "http2transportResponseBody.Close"
},
{
"name": "http2transportResponseBody.Read"
},
{
"name": "http2unencryptedTransport.RoundTrip"
},
{
"name": "http2writeData.String"
},
{
"name": "initALPNRequest.ServeHTTP"
},
{
"name": "loggingConn.Close"
},
{
"name": "loggingConn.Read"
},
{
"name": "loggingConn.Write"
},
{
"name": "maxBytesReader.Close"
},
{
"name": "maxBytesReader.Read"
},
{
"name": "onceCloseListener.Close"
},
{
"name": "persistConn.Read"
},
{
"name": "persistConnWriter.ReadFrom"
},
{
"name": "persistConnWriter.Write"
},
{
"name": "populateResponse.Write"
},
{
"name": "populateResponse.WriteHeader"
},
{
"name": "readTrackingBody.Close"
},
{
"name": "readTrackingBody.Read"
},
{
"name": "readWriteCloserBody.CloseWrite"
},
{
"name": "readWriteCloserBody.Read"
},
{
"name": "redirectHandler.ServeHTTP"
},
{
"name": "response.Flush"
},
{
"name": "response.FlushError"
},
{
"name": "response.Hijack"
},
{
"name": "response.ReadFrom"
},
{
"name": "response.Write"
},
{
"name": "response.WriteHeader"
},
{
"name": "response.WriteString"
},
{
"name": "serverHandler.ServeHTTP"
},
{
"name": "socksDialer.DialWithConn"
},
{
"name": "socksUsernamePassword.Authenticate"
},
{
"name": "stringWriter.WriteString"
},
{
"name": "timeoutHandler.ServeHTTP"
},
{
"name": "timeoutWriter.Write"
},
{
"name": "timeoutWriter.WriteHeader"
},
{
"name": "transportReadFromServerError.Error"
},
{
"name": "unencryptedHTTP2Request.ServeHTTP"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.26.9",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net/http/internal/http2",
"product": "net/http/internal/http2",
"programRoutines": [
{
"name": "outflow.add"
},
{
"name": "outflow.available"
},
{
"name": "outflow.setConnFlow"
},
{
"name": "outflow.take"
},
{
"name": "Server.serveConn"
},
{
"name": "serverConn.newStream"
},
{
"name": "serverConn.processSettingInitialWindowSize"
},
{
"name": "serverConn.processWindowUpdate"
},
{
"name": "serverConn.scheduleFrameWrite"
},
{
"name": "ClientConn.addStreamLocked"
},
{
"name": "Transport.newClientConn"
},
{
"name": "clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "clientConnReadLoop.processWindowUpdate"
},
{
"name": "clientConnReadLoop.streamByID"
},
{
"name": "clientStream.awaitFlowControl"
},
{
"name": "clientStream.cleanupWriteRequest"
},
{
"name": "FrameWriteRequest.Consume"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.Ping"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "ClientConn.Shutdown"
},
{
"name": "Framer.ReadFrame"
},
{
"name": "Framer.ReadFrameForHeader"
},
{
"name": "Framer.ReadFrameHeader"
},
{
"name": "Framer.WriteContinuation"
},
{
"name": "Framer.WriteData"
},
{
"name": "Framer.WriteDataPadded"
},
{
"name": "Framer.WriteGoAway"
},
{
"name": "Framer.WriteHeaders"
},
{
"name": "Framer.WritePing"
},
{
"name": "Framer.WritePriority"
},
{
"name": "Framer.WritePriorityUpdate"
},
{
"name": "Framer.WritePushPromise"
},
{
"name": "Framer.WriteRSTStream"
},
{
"name": "Framer.WriteRawFrame"
},
{
"name": "Framer.WriteSettings"
},
{
"name": "Framer.WriteSettingsAck"
},
{
"name": "Framer.WriteWindowUpdate"
},
{
"name": "NetHTTPClientConn.Close"
},
{
"name": "NetHTTPClientConn.Ping"
},
{
"name": "NetHTTPClientConn.RoundTrip"
},
{
"name": "ReadFrameHeader"
},
{
"name": "Server.GracefulShutdown"
},
{
"name": "Server.ServeConn"
},
{
"name": "SettingsFrame.ForeachSetting"
},
{
"name": "Transport.AddConn"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "Transport.RoundTripOpt"
},
{
"name": "bufferedWriter.Flush"
},
{
"name": "bufferedWriter.Write"
},
{
"name": "bufferedWriterTimeoutWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "clientConnPool.GetClientConn"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "noDialClientConnPool.GetClientConn"
},
{
"name": "priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "requestBody.Close"
},
{
"name": "responseWriter.Flush"
},
{
"name": "responseWriter.FlushError"
},
{
"name": "responseWriter.Push"
},
{
"name": "responseWriter.Write"
},
{
"name": "responseWriter.WriteHeader"
},
{
"name": "responseWriter.WriteString"
},
{
"name": "roundRobinWriteScheduler.Pop"
},
{
"name": "serve400Handler.ServeHTTP"
},
{
"name": "serverConn.Flush"
},
{
"name": "stickyErrWriter.Write"
},
{
"name": "transportResponseBody.Close"
},
{
"name": "transportResponseBody.Read"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.27.2",
"status": "affected",
"version": "1.27.0-0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/net/http2",
"product": "golang.org/x/net/http2",
"programRoutines": [
{
"name": "outflow.add"
},
{
"name": "outflow.available"
},
{
"name": "outflow.setConnFlow"
},
{
"name": "outflow.take"
},
{
"name": "Server.serveConn"
},
{
"name": "serverConn.newStream"
},
{
"name": "serverConn.processSettingInitialWindowSize"
},
{
"name": "serverConn.processWindowUpdate"
},
{
"name": "serverConn.scheduleFrameWrite"
},
{
"name": "ClientConn.addStreamLocked"
},
{
"name": "Transport.newClientConn"
},
{
"name": "clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "clientConnReadLoop.processWindowUpdate"
},
{
"name": "clientConnReadLoop.streamByID"
},
{
"name": "clientStream.awaitFlowControl"
},
{
"name": "clientStream.cleanupWriteRequest"
},
{
"name": "FrameWriteRequest.Consume"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.Ping"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "ClientConn.Shutdown"
},
{
"name": "ConfigureServer"
},
{
"name": "ConfigureTransport"
},
{
"name": "ConfigureTransports"
},
{
"name": "ConnectionError.Error"
},
{
"name": "ErrCode.String"
},
{
"name": "FrameHeader.String"
},
{
"name": "FrameType.String"
},
{
"name": "FrameWriteRequest.String"
},
{
"name": "Framer.ReadFrame"
},
{
"name": "Framer.ReadFrameForHeader"
},
{
"name": "Framer.ReadFrameHeader"
},
{
"name": "Framer.WriteContinuation"
},
{
"name": "Framer.WriteData"
},
{
"name": "Framer.WriteDataPadded"
},
{
"name": "Framer.WriteGoAway"
},
{
"name": "Framer.WriteHeaders"
},
{
"name": "Framer.WritePing"
},
{
"name": "Framer.WritePriority"
},
{
"name": "Framer.WritePriorityUpdate"
},
{
"name": "Framer.WritePushPromise"
},
{
"name": "Framer.WriteRSTStream"
},
{
"name": "Framer.WriteRawFrame"
},
{
"name": "Framer.WriteSettings"
},
{
"name": "Framer.WriteSettingsAck"
},
{
"name": "Framer.WriteWindowUpdate"
},
{
"name": "GoAwayError.Error"
},
{
"name": "ReadFrameHeader"
},
{
"name": "Server.ServeConn"
},
{
"name": "Setting.String"
},
{
"name": "SettingID.String"
},
{
"name": "SettingsFrame.ForeachSetting"
},
{
"name": "StreamError.Error"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "Transport.RoundTripOpt"
},
{
"name": "bufferedWriter.Flush"
},
{
"name": "bufferedWriter.Write"
},
{
"name": "bufferedWriterTimeoutWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "clientConnPool.GetClientConn"
},
{
"name": "connError.Error"
},
{
"name": "dataBuffer.Read"
},
{
"name": "duplicatePseudoHeaderError.Error"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "headerFieldNameError.Error"
},
{
"name": "headerFieldValueError.Error"
},
{
"name": "netHTTPClientConn.Close"
},
{
"name": "netHTTPClientConn.RoundTrip"
},
{
"name": "noDialClientConnPool.GetClientConn"
},
{
"name": "noDialH2RoundTripper.NewClientConn"
},
{
"name": "noDialH2RoundTripper.RoundTrip"
},
{
"name": "pipe.Read"
},
{
"name": "priorityWriteSchedulerRFC7540.CloseStream"
},
{
"name": "priorityWriteSchedulerRFC7540.OpenStream"
},
{
"name": "priorityWriteSchedulerRFC7540.Pop"
},
{
"name": "priorityWriteSchedulerRFC9218.OpenStream"
},
{
"name": "priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "pseudoHeaderError.Error"
},
{
"name": "randomWriteScheduler.Pop"
},
{
"name": "requestBody.Close"
},
{
"name": "requestBody.Read"
},
{
"name": "responseWriter.Flush"
},
{
"name": "responseWriter.FlushError"
},
{
"name": "responseWriter.Push"
},
{
"name": "responseWriter.SetReadDeadline"
},
{
"name": "responseWriter.SetWriteDeadline"
},
{
"name": "responseWriter.Write"
},
{
"name": "responseWriter.WriteHeader"
},
{
"name": "responseWriter.WriteString"
},
{
"name": "roundRobinWriteScheduler.OpenStream"
},
{
"name": "roundRobinWriteScheduler.Pop"
},
{
"name": "serverConn.CloseConn"
},
{
"name": "serverConn.Flush"
},
{
"name": "stickyErrWriter.Write"
},
{
"name": "transportResponseBody.Close"
},
{
"name": "transportResponseBody.Read"
},
{
"name": "unencryptedTransport.RoundTrip"
},
{
"name": "writeData.String"
}
],
"vendor": "golang.org/x/net",
"versions": [
{
"lessThan": "0.60.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Jakub Ciolek (https://ciolek.dev)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-405: Asymmetric Resource Consumption (Amplification)",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-08T22:53:59.530Z",
"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/cl/847186"
},
{
"url": "https://go.dev/cl/847308"
},
{
"url": "https://go.dev/issue/81742"
},
{
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"url": "https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-6611"
}
],
"title": "Excessive CPU consumption from repeated initial window changes in net/http"
}
},
"cveMetadata": {
"assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"assignerShortName": "Go",
"cveId": "CVE-2026-78669",
"datePublished": "2026-10-08T22:53:59.530Z",
"dateReserved": "2026-08-24T23:36:15.739Z",
"dateUpdated": "2026-10-09T16:32:57.198Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-78669",
"date": "2026-10-09",
"epss": "0.00227",
"percentile": "0.12384"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net/http",
"product": "net/http",
"programRoutines": [
{
"name": "http2outflow.add"
},
{
"name": "http2outflow.available"
},
{
"name": "http2outflow.setConnFlow"
},
{
"name": "http2outflow.take"
},
{
"name": "http2Server.serveConn"
},
{
"name": "http2serverConn.newStream"
},
{
"name": "http2serverConn.processSettingInitialWindowSize"
},
{
"name": "http2serverConn.processWindowUpdate"
},
{
"name": "http2serverConn.scheduleFrameWrite"
},
{
"name": "http2ClientConn.addStreamLocked"
},
{
"name": "http2Transport.newClientConn"
},
{
"name": "http2clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "http2clientConnReadLoop.processWindowUpdate"
},
{
"name": "http2clientConnReadLoop.streamByID"
},
{
"name": "http2clientStream.awaitFlowControl"
},
{
"name": "http2clientStream.cleanupWriteRequest"
},
{
"name": "http2FrameWriteRequest.Consume"
},
{
"name": "CanonicalHeaderKey"
},
{
"name": "Client.CloseIdleConnections"
},
{
"name": "Client.Do"
},
{
"name": "Client.Get"
},
{
"name": "Client.Head"
},
{
"name": "Client.Post"
},
{
"name": "Client.PostForm"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "Cookie.String"
},
{
"name": "Cookie.Valid"
},
{
"name": "CrossOriginProtection.AddInsecureBypassPattern"
},
{
"name": "CrossOriginProtection.AddTrustedOrigin"
},
{
"name": "CrossOriginProtection.Check"
},
{
"name": "Dir.Open"
},
{
"name": "Error"
},
{
"name": "Get"
},
{
"name": "Handle"
},
{
"name": "HandleFunc"
},
{
"name": "HandlerFunc.ServeHTTP"
},
{
"name": "Head"
},
{
"name": "Header.Add"
},
{
"name": "Header.Del"
},
{
"name": "Header.Get"
},
{
"name": "Header.Set"
},
{
"name": "Header.Values"
},
{
"name": "Header.Write"
},
{
"name": "Header.WriteSubset"
},
{
"name": "ListenAndServe"
},
{
"name": "ListenAndServeTLS"
},
{
"name": "NewRequest"
},
{
"name": "NewRequestWithContext"
},
{
"name": "NotFound"
},
{
"name": "ParseCookie"
},
{
"name": "ParseSetCookie"
},
{
"name": "ParseTime"
},
{
"name": "Post"
},
{
"name": "PostForm"
},
{
"name": "ProxyFromEnvironment"
},
{
"name": "ReadRequest"
},
{
"name": "ReadResponse"
},
{
"name": "Redirect"
},
{
"name": "Request.AddCookie"
},
{
"name": "Request.BasicAuth"
},
{
"name": "Request.Cookie"
},
{
"name": "Request.Cookies"
},
{
"name": "Request.CookiesNamed"
},
{
"name": "Request.FormFile"
},
{
"name": "Request.FormValue"
},
{
"name": "Request.MultipartReader"
},
{
"name": "Request.ParseForm"
},
{
"name": "Request.ParseMultipartForm"
},
{
"name": "Request.PostFormValue"
},
{
"name": "Request.Referer"
},
{
"name": "Request.SetBasicAuth"
},
{
"name": "Request.UserAgent"
},
{
"name": "Request.Write"
},
{
"name": "Request.WriteProxy"
},
{
"name": "Response.Cookies"
},
{
"name": "Response.Location"
},
{
"name": "Response.Write"
},
{
"name": "ResponseController.EnableFullDuplex"
},
{
"name": "ResponseController.Flush"
},
{
"name": "ResponseController.Hijack"
},
{
"name": "ResponseController.SetReadDeadline"
},
{
"name": "ResponseController.SetWriteDeadline"
},
{
"name": "Serve"
},
{
"name": "ServeContent"
},
{
"name": "ServeFile"
},
{
"name": "ServeFileFS"
},
{
"name": "ServeMux.Handle"
},
{
"name": "ServeMux.HandleFunc"
},
{
"name": "ServeMux.ServeHTTP"
},
{
"name": "ServeTLS"
},
{
"name": "Server.Close"
},
{
"name": "Server.ListenAndServe"
},
{
"name": "Server.ListenAndServeTLS"
},
{
"name": "Server.Serve"
},
{
"name": "Server.ServeTLS"
},
{
"name": "Server.SetKeepAlivesEnabled"
},
{
"name": "Server.Shutdown"
},
{
"name": "SetCookie"
},
{
"name": "Transport.CancelRequest"
},
{
"name": "Transport.Clone"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "body.Close"
},
{
"name": "body.Read"
},
{
"name": "bodyEOFSignal.Close"
},
{
"name": "bodyEOFSignal.Read"
},
{
"name": "bodyLocked.Read"
},
{
"name": "bufioFlushWriter.Write"
},
{
"name": "cancelTimerBody.Close"
},
{
"name": "cancelTimerBody.Read"
},
{
"name": "checkConnErrorWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "connReader.Read"
},
{
"name": "connectMethodKey.String"
},
{
"name": "expectContinueReader.Close"
},
{
"name": "expectContinueReader.Read"
},
{
"name": "extraHeader.Write"
},
{
"name": "fileHandler.ServeHTTP"
},
{
"name": "fileTransport.RoundTrip"
},
{
"name": "globalOptionsHandler.ServeHTTP"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "http1ClientConn.Close"
},
{
"name": "http1ClientConn.RoundTrip"
},
{
"name": "http2ClientConn.Close"
},
{
"name": "http2ClientConn.Ping"
},
{
"name": "http2ClientConn.RoundTrip"
},
{
"name": "http2ClientConn.Shutdown"
},
{
"name": "http2ConnectionError.Error"
},
{
"name": "http2ErrCode.String"
},
{
"name": "http2FrameHeader.String"
},
{
"name": "http2FrameType.String"
},
{
"name": "http2FrameWriteRequest.String"
},
{
"name": "http2Framer.ReadFrame"
},
{
"name": "http2Framer.ReadFrameForHeader"
},
{
"name": "http2Framer.ReadFrameHeader"
},
{
"name": "http2Framer.WriteContinuation"
},
{
"name": "http2Framer.WriteData"
},
{
"name": "http2Framer.WriteDataPadded"
},
{
"name": "http2Framer.WriteGoAway"
},
{
"name": "http2Framer.WriteHeaders"
},
{
"name": "http2Framer.WritePing"
},
{
"name": "http2Framer.WritePriority"
},
{
"name": "http2Framer.WritePushPromise"
},
{
"name": "http2Framer.WriteRSTStream"
},
{
"name": "http2Framer.WriteRawFrame"
},
{
"name": "http2Framer.WriteSettings"
},
{
"name": "http2Framer.WriteSettingsAck"
},
{
"name": "http2Framer.WriteWindowUpdate"
},
{
"name": "http2GoAwayError.Error"
},
{
"name": "http2Server.ServeConn"
},
{
"name": "http2Setting.String"
},
{
"name": "http2SettingID.String"
},
{
"name": "http2SettingsFrame.ForeachSetting"
},
{
"name": "http2StreamError.Error"
},
{
"name": "http2Transport.CloseIdleConnections"
},
{
"name": "http2Transport.NewClientConn"
},
{
"name": "http2Transport.RoundTrip"
},
{
"name": "http2Transport.RoundTripOpt"
},
{
"name": "http2bufferedWriter.Flush"
},
{
"name": "http2bufferedWriter.Write"
},
{
"name": "http2bufferedWriterTimeoutWriter.Write"
},
{
"name": "http2chunkWriter.Write"
},
{
"name": "http2clientConnPool.GetClientConn"
},
{
"name": "http2connError.Error"
},
{
"name": "http2dataBuffer.Read"
},
{
"name": "http2duplicatePseudoHeaderError.Error"
},
{
"name": "http2gzipReader.Close"
},
{
"name": "http2gzipReader.Read"
},
{
"name": "http2headerFieldNameError.Error"
},
{
"name": "http2headerFieldValueError.Error"
},
{
"name": "http2netHTTPClientConn.Close"
},
{
"name": "http2netHTTPClientConn.RoundTrip"
},
{
"name": "http2noDialClientConnPool.GetClientConn"
},
{
"name": "http2noDialH2RoundTripper.NewClientConn"
},
{
"name": "http2noDialH2RoundTripper.RoundTrip"
},
{
"name": "http2pipe.Read"
},
{
"name": "http2priorityWriteSchedulerRFC7540.CloseStream"
},
{
"name": "http2priorityWriteSchedulerRFC7540.OpenStream"
},
{
"name": "http2priorityWriteSchedulerRFC7540.Pop"
},
{
"name": "http2priorityWriteSchedulerRFC9218.OpenStream"
},
{
"name": "http2priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "http2pseudoHeaderError.Error"
},
{
"name": "http2randomWriteScheduler.Pop"
},
{
"name": "http2requestBody.Close"
},
{
"name": "http2requestBody.Read"
},
{
"name": "http2responseWriter.Flush"
},
{
"name": "http2responseWriter.FlushError"
},
{
"name": "http2responseWriter.Push"
},
{
"name": "http2responseWriter.SetReadDeadline"
},
{
"name": "http2responseWriter.SetWriteDeadline"
},
{
"name": "http2responseWriter.Write"
},
{
"name": "http2responseWriter.WriteHeader"
},
{
"name": "http2responseWriter.WriteString"
},
{
"name": "http2roundRobinWriteScheduler.OpenStream"
},
{
"name": "http2roundRobinWriteScheduler.Pop"
},
{
"name": "http2serverConn.CloseConn"
},
{
"name": "http2serverConn.Flush"
},
{
"name": "http2stickyErrWriter.Write"
},
{
"name": "http2transportResponseBody.Close"
},
{
"name": "http2transportResponseBody.Read"
},
{
"name": "http2unencryptedTransport.RoundTrip"
},
{
"name": "http2writeData.String"
},
{
"name": "initALPNRequest.ServeHTTP"
},
{
"name": "loggingConn.Close"
},
{
"name": "loggingConn.Read"
},
{
"name": "loggingConn.Write"
},
{
"name": "maxBytesReader.Close"
},
{
"name": "maxBytesReader.Read"
},
{
"name": "onceCloseListener.Close"
},
{
"name": "persistConn.Read"
},
{
"name": "persistConnWriter.ReadFrom"
},
{
"name": "persistConnWriter.Write"
},
{
"name": "populateResponse.Write"
},
{
"name": "populateResponse.WriteHeader"
},
{
"name": "readTrackingBody.Close"
},
{
"name": "readTrackingBody.Read"
},
{
"name": "readWriteCloserBody.CloseWrite"
},
{
"name": "readWriteCloserBody.Read"
},
{
"name": "redirectHandler.ServeHTTP"
},
{
"name": "response.Flush"
},
{
"name": "response.FlushError"
},
{
"name": "response.Hijack"
},
{
"name": "response.ReadFrom"
},
{
"name": "response.Write"
},
{
"name": "response.WriteHeader"
},
{
"name": "response.WriteString"
},
{
"name": "serverHandler.ServeHTTP"
},
{
"name": "socksDialer.DialWithConn"
},
{
"name": "socksUsernamePassword.Authenticate"
},
{
"name": "stringWriter.WriteString"
},
{
"name": "timeoutHandler.ServeHTTP"
},
{
"name": "timeoutWriter.Write"
},
{
"name": "timeoutWriter.WriteHeader"
},
{
"name": "transportReadFromServerError.Error"
},
{
"name": "unencryptedHTTP2Request.ServeHTTP"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.26.9",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net/http/internal/http2",
"product": "net/http/internal/http2",
"programRoutines": [
{
"name": "outflow.add"
},
{
"name": "outflow.available"
},
{
"name": "outflow.setConnFlow"
},
{
"name": "outflow.take"
},
{
"name": "Server.serveConn"
},
{
"name": "serverConn.newStream"
},
{
"name": "serverConn.processSettingInitialWindowSize"
},
{
"name": "serverConn.processWindowUpdate"
},
{
"name": "serverConn.scheduleFrameWrite"
},
{
"name": "ClientConn.addStreamLocked"
},
{
"name": "Transport.newClientConn"
},
{
"name": "clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "clientConnReadLoop.processWindowUpdate"
},
{
"name": "clientConnReadLoop.streamByID"
},
{
"name": "clientStream.awaitFlowControl"
},
{
"name": "clientStream.cleanupWriteRequest"
},
{
"name": "FrameWriteRequest.Consume"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.Ping"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "ClientConn.Shutdown"
},
{
"name": "Framer.ReadFrame"
},
{
"name": "Framer.ReadFrameForHeader"
},
{
"name": "Framer.ReadFrameHeader"
},
{
"name": "Framer.WriteContinuation"
},
{
"name": "Framer.WriteData"
},
{
"name": "Framer.WriteDataPadded"
},
{
"name": "Framer.WriteGoAway"
},
{
"name": "Framer.WriteHeaders"
},
{
"name": "Framer.WritePing"
},
{
"name": "Framer.WritePriority"
},
{
"name": "Framer.WritePriorityUpdate"
},
{
"name": "Framer.WritePushPromise"
},
{
"name": "Framer.WriteRSTStream"
},
{
"name": "Framer.WriteRawFrame"
},
{
"name": "Framer.WriteSettings"
},
{
"name": "Framer.WriteSettingsAck"
},
{
"name": "Framer.WriteWindowUpdate"
},
{
"name": "NetHTTPClientConn.Close"
},
{
"name": "NetHTTPClientConn.Ping"
},
{
"name": "NetHTTPClientConn.RoundTrip"
},
{
"name": "ReadFrameHeader"
},
{
"name": "Server.GracefulShutdown"
},
{
"name": "Server.ServeConn"
},
{
"name": "SettingsFrame.ForeachSetting"
},
{
"name": "Transport.AddConn"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "Transport.RoundTripOpt"
},
{
"name": "bufferedWriter.Flush"
},
{
"name": "bufferedWriter.Write"
},
{
"name": "bufferedWriterTimeoutWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "clientConnPool.GetClientConn"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "noDialClientConnPool.GetClientConn"
},
{
"name": "priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "requestBody.Close"
},
{
"name": "responseWriter.Flush"
},
{
"name": "responseWriter.FlushError"
},
{
"name": "responseWriter.Push"
},
{
"name": "responseWriter.Write"
},
{
"name": "responseWriter.WriteHeader"
},
{
"name": "responseWriter.WriteString"
},
{
"name": "roundRobinWriteScheduler.Pop"
},
{
"name": "serve400Handler.ServeHTTP"
},
{
"name": "serverConn.Flush"
},
{
"name": "stickyErrWriter.Write"
},
{
"name": "transportResponseBody.Close"
},
{
"name": "transportResponseBody.Read"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.27.2",
"status": "affected",
"version": "1.27.0-0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/net/http2",
"product": "golang.org/x/net/http2",
"programRoutines": [
{
"name": "outflow.add"
},
{
"name": "outflow.available"
},
{
"name": "outflow.setConnFlow"
},
{
"name": "outflow.take"
},
{
"name": "Server.serveConn"
},
{
"name": "serverConn.newStream"
},
{
"name": "serverConn.processSettingInitialWindowSize"
},
{
"name": "serverConn.processWindowUpdate"
},
{
"name": "serverConn.scheduleFrameWrite"
},
{
"name": "ClientConn.addStreamLocked"
},
{
"name": "Transport.newClientConn"
},
{
"name": "clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "clientConnReadLoop.processWindowUpdate"
},
{
"name": "clientConnReadLoop.streamByID"
},
{
"name": "clientStream.awaitFlowControl"
},
{
"name": "clientStream.cleanupWriteRequest"
},
{
"name": "FrameWriteRequest.Consume"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.Ping"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "ClientConn.Shutdown"
},
{
"name": "ConfigureServer"
},
{
"name": "ConfigureTransport"
},
{
"name": "ConfigureTransports"
},
{
"name": "ConnectionError.Error"
},
{
"name": "ErrCode.String"
},
{
"name": "FrameHeader.String"
},
{
"name": "FrameType.String"
},
{
"name": "FrameWriteRequest.String"
},
{
"name": "Framer.ReadFrame"
},
{
"name": "Framer.ReadFrameForHeader"
},
{
"name": "Framer.ReadFrameHeader"
},
{
"name": "Framer.WriteContinuation"
},
{
"name": "Framer.WriteData"
},
{
"name": "Framer.WriteDataPadded"
},
{
"name": "Framer.WriteGoAway"
},
{
"name": "Framer.WriteHeaders"
},
{
"name": "Framer.WritePing"
},
{
"name": "Framer.WritePriority"
},
{
"name": "Framer.WritePriorityUpdate"
},
{
"name": "Framer.WritePushPromise"
},
{
"name": "Framer.WriteRSTStream"
},
{
"name": "Framer.WriteRawFrame"
},
{
"name": "Framer.WriteSettings"
},
{
"name": "Framer.WriteSettingsAck"
},
{
"name": "Framer.WriteWindowUpdate"
},
{
"name": "GoAwayError.Error"
},
{
"name": "ReadFrameHeader"
},
{
"name": "Server.ServeConn"
},
{
"name": "Setting.String"
},
{
"name": "SettingID.String"
},
{
"name": "SettingsFrame.ForeachSetting"
},
{
"name": "StreamError.Error"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "Transport.RoundTripOpt"
},
{
"name": "bufferedWriter.Flush"
},
{
"name": "bufferedWriter.Write"
},
{
"name": "bufferedWriterTimeoutWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "clientConnPool.GetClientConn"
},
{
"name": "connError.Error"
},
{
"name": "dataBuffer.Read"
},
{
"name": "duplicatePseudoHeaderError.Error"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "headerFieldNameError.Error"
},
{
"name": "headerFieldValueError.Error"
},
{
"name": "netHTTPClientConn.Close"
},
{
"name": "netHTTPClientConn.RoundTrip"
},
{
"name": "noDialClientConnPool.GetClientConn"
},
{
"name": "noDialH2RoundTripper.NewClientConn"
},
{
"name": "noDialH2RoundTripper.RoundTrip"
},
{
"name": "pipe.Read"
},
{
"name": "priorityWriteSchedulerRFC7540.CloseStream"
},
{
"name": "priorityWriteSchedulerRFC7540.OpenStream"
},
{
"name": "priorityWriteSchedulerRFC7540.Pop"
},
{
"name": "priorityWriteSchedulerRFC9218.OpenStream"
},
{
"name": "priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "pseudoHeaderError.Error"
},
{
"name": "randomWriteScheduler.Pop"
},
{
"name": "requestBody.Close"
},
{
"name": "requestBody.Read"
},
{
"name": "responseWriter.Flush"
},
{
"name": "responseWriter.FlushError"
},
{
"name": "responseWriter.Push"
},
{
"name": "responseWriter.SetReadDeadline"
},
{
"name": "responseWriter.SetWriteDeadline"
},
{
"name": "responseWriter.Write"
},
{
"name": "responseWriter.WriteHeader"
},
{
"name": "responseWriter.WriteString"
},
{
"name": "roundRobinWriteScheduler.OpenStream"
},
{
"name": "roundRobinWriteScheduler.Pop"
},
{
"name": "serverConn.CloseConn"
},
{
"name": "serverConn.Flush"
},
{
"name": "stickyErrWriter.Write"
},
{
"name": "transportResponseBody.Close"
},
{
"name": "transportResponseBody.Read"
},
{
"name": "unencryptedTransport.RoundTrip"
},
{
"name": "writeData.String"
}
],
"vendor": "golang.org/x/net",
"versions": [
{
"lessThan": "0.60.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"source": "security@golang.org"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values."
}
],
"id": "CVE-2026-78669",
"lastModified": "2026-10-09T17:16:49.857",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-78669",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-09T16:32:53.872432Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-10-08T23:17:04.010",
"references": [
{
"source": "security@golang.org",
"url": "https://go.dev/cl/847186"
},
{
"source": "security@golang.org",
"url": "https://go.dev/cl/847308"
},
{
"source": "security@golang.org",
"url": "https://go.dev/issue/81742"
},
{
"source": "security@golang.org",
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"source": "security@golang.org",
"url": "https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs"
},
{
"source": "security@golang.org",
"url": "https://pkg.go.dev/vuln/GO-2026-6611"
}
],
"sourceIdentifier": "security@golang.org",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-405"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-10-09T17:37:18+00:00",
"cve": "CVE-2026-78669",
"id": "CVE-2026-78669",
"initial_release_date": "2026-10-08T22:53:59.530000+00:00",
"product_status:known_affected": "333",
"product_status:known_not_affected": "8",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "net/http: net/http/internal/http2: golang: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-78669.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-78669",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-09T16:32:53.872432Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-405",
"description": "CWE-405 Asymmetric Resource Consumption (Amplification)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-09T16:31:11.090Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net/http",
"product": "net/http",
"programRoutines": [
{
"name": "http2outflow.add"
},
{
"name": "http2outflow.available"
},
{
"name": "http2outflow.setConnFlow"
},
{
"name": "http2outflow.take"
},
{
"name": "http2Server.serveConn"
},
{
"name": "http2serverConn.newStream"
},
{
"name": "http2serverConn.processSettingInitialWindowSize"
},
{
"name": "http2serverConn.processWindowUpdate"
},
{
"name": "http2serverConn.scheduleFrameWrite"
},
{
"name": "http2ClientConn.addStreamLocked"
},
{
"name": "http2Transport.newClientConn"
},
{
"name": "http2clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "http2clientConnReadLoop.processWindowUpdate"
},
{
"name": "http2clientConnReadLoop.streamByID"
},
{
"name": "http2clientStream.awaitFlowControl"
},
{
"name": "http2clientStream.cleanupWriteRequest"
},
{
"name": "http2FrameWriteRequest.Consume"
},
{
"name": "CanonicalHeaderKey"
},
{
"name": "Client.CloseIdleConnections"
},
{
"name": "Client.Do"
},
{
"name": "Client.Get"
},
{
"name": "Client.Head"
},
{
"name": "Client.Post"
},
{
"name": "Client.PostForm"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "Cookie.String"
},
{
"name": "Cookie.Valid"
},
{
"name": "CrossOriginProtection.AddInsecureBypassPattern"
},
{
"name": "CrossOriginProtection.AddTrustedOrigin"
},
{
"name": "CrossOriginProtection.Check"
},
{
"name": "Dir.Open"
},
{
"name": "Error"
},
{
"name": "Get"
},
{
"name": "Handle"
},
{
"name": "HandleFunc"
},
{
"name": "HandlerFunc.ServeHTTP"
},
{
"name": "Head"
},
{
"name": "Header.Add"
},
{
"name": "Header.Del"
},
{
"name": "Header.Get"
},
{
"name": "Header.Set"
},
{
"name": "Header.Values"
},
{
"name": "Header.Write"
},
{
"name": "Header.WriteSubset"
},
{
"name": "ListenAndServe"
},
{
"name": "ListenAndServeTLS"
},
{
"name": "NewRequest"
},
{
"name": "NewRequestWithContext"
},
{
"name": "NotFound"
},
{
"name": "ParseCookie"
},
{
"name": "ParseSetCookie"
},
{
"name": "ParseTime"
},
{
"name": "Post"
},
{
"name": "PostForm"
},
{
"name": "ProxyFromEnvironment"
},
{
"name": "ReadRequest"
},
{
"name": "ReadResponse"
},
{
"name": "Redirect"
},
{
"name": "Request.AddCookie"
},
{
"name": "Request.BasicAuth"
},
{
"name": "Request.Cookie"
},
{
"name": "Request.Cookies"
},
{
"name": "Request.CookiesNamed"
},
{
"name": "Request.FormFile"
},
{
"name": "Request.FormValue"
},
{
"name": "Request.MultipartReader"
},
{
"name": "Request.ParseForm"
},
{
"name": "Request.ParseMultipartForm"
},
{
"name": "Request.PostFormValue"
},
{
"name": "Request.Referer"
},
{
"name": "Request.SetBasicAuth"
},
{
"name": "Request.UserAgent"
},
{
"name": "Request.Write"
},
{
"name": "Request.WriteProxy"
},
{
"name": "Response.Cookies"
},
{
"name": "Response.Location"
},
{
"name": "Response.Write"
},
{
"name": "ResponseController.EnableFullDuplex"
},
{
"name": "ResponseController.Flush"
},
{
"name": "ResponseController.Hijack"
},
{
"name": "ResponseController.SetReadDeadline"
},
{
"name": "ResponseController.SetWriteDeadline"
},
{
"name": "Serve"
},
{
"name": "ServeContent"
},
{
"name": "ServeFile"
},
{
"name": "ServeFileFS"
},
{
"name": "ServeMux.Handle"
},
{
"name": "ServeMux.HandleFunc"
},
{
"name": "ServeMux.ServeHTTP"
},
{
"name": "ServeTLS"
},
{
"name": "Server.Close"
},
{
"name": "Server.ListenAndServe"
},
{
"name": "Server.ListenAndServeTLS"
},
{
"name": "Server.Serve"
},
{
"name": "Server.ServeTLS"
},
{
"name": "Server.SetKeepAlivesEnabled"
},
{
"name": "Server.Shutdown"
},
{
"name": "SetCookie"
},
{
"name": "Transport.CancelRequest"
},
{
"name": "Transport.Clone"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "body.Close"
},
{
"name": "body.Read"
},
{
"name": "bodyEOFSignal.Close"
},
{
"name": "bodyEOFSignal.Read"
},
{
"name": "bodyLocked.Read"
},
{
"name": "bufioFlushWriter.Write"
},
{
"name": "cancelTimerBody.Close"
},
{
"name": "cancelTimerBody.Read"
},
{
"name": "checkConnErrorWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "connReader.Read"
},
{
"name": "connectMethodKey.String"
},
{
"name": "expectContinueReader.Close"
},
{
"name": "expectContinueReader.Read"
},
{
"name": "extraHeader.Write"
},
{
"name": "fileHandler.ServeHTTP"
},
{
"name": "fileTransport.RoundTrip"
},
{
"name": "globalOptionsHandler.ServeHTTP"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "http1ClientConn.Close"
},
{
"name": "http1ClientConn.RoundTrip"
},
{
"name": "http2ClientConn.Close"
},
{
"name": "http2ClientConn.Ping"
},
{
"name": "http2ClientConn.RoundTrip"
},
{
"name": "http2ClientConn.Shutdown"
},
{
"name": "http2ConnectionError.Error"
},
{
"name": "http2ErrCode.String"
},
{
"name": "http2FrameHeader.String"
},
{
"name": "http2FrameType.String"
},
{
"name": "http2FrameWriteRequest.String"
},
{
"name": "http2Framer.ReadFrame"
},
{
"name": "http2Framer.ReadFrameForHeader"
},
{
"name": "http2Framer.ReadFrameHeader"
},
{
"name": "http2Framer.WriteContinuation"
},
{
"name": "http2Framer.WriteData"
},
{
"name": "http2Framer.WriteDataPadded"
},
{
"name": "http2Framer.WriteGoAway"
},
{
"name": "http2Framer.WriteHeaders"
},
{
"name": "http2Framer.WritePing"
},
{
"name": "http2Framer.WritePriority"
},
{
"name": "http2Framer.WritePushPromise"
},
{
"name": "http2Framer.WriteRSTStream"
},
{
"name": "http2Framer.WriteRawFrame"
},
{
"name": "http2Framer.WriteSettings"
},
{
"name": "http2Framer.WriteSettingsAck"
},
{
"name": "http2Framer.WriteWindowUpdate"
},
{
"name": "http2GoAwayError.Error"
},
{
"name": "http2Server.ServeConn"
},
{
"name": "http2Setting.String"
},
{
"name": "http2SettingID.String"
},
{
"name": "http2SettingsFrame.ForeachSetting"
},
{
"name": "http2StreamError.Error"
},
{
"name": "http2Transport.CloseIdleConnections"
},
{
"name": "http2Transport.NewClientConn"
},
{
"name": "http2Transport.RoundTrip"
},
{
"name": "http2Transport.RoundTripOpt"
},
{
"name": "http2bufferedWriter.Flush"
},
{
"name": "http2bufferedWriter.Write"
},
{
"name": "http2bufferedWriterTimeoutWriter.Write"
},
{
"name": "http2chunkWriter.Write"
},
{
"name": "http2clientConnPool.GetClientConn"
},
{
"name": "http2connError.Error"
},
{
"name": "http2dataBuffer.Read"
},
{
"name": "http2duplicatePseudoHeaderError.Error"
},
{
"name": "http2gzipReader.Close"
},
{
"name": "http2gzipReader.Read"
},
{
"name": "http2headerFieldNameError.Error"
},
{
"name": "http2headerFieldValueError.Error"
},
{
"name": "http2netHTTPClientConn.Close"
},
{
"name": "http2netHTTPClientConn.RoundTrip"
},
{
"name": "http2noDialClientConnPool.GetClientConn"
},
{
"name": "http2noDialH2RoundTripper.NewClientConn"
},
{
"name": "http2noDialH2RoundTripper.RoundTrip"
},
{
"name": "http2pipe.Read"
},
{
"name": "http2priorityWriteSchedulerRFC7540.CloseStream"
},
{
"name": "http2priorityWriteSchedulerRFC7540.OpenStream"
},
{
"name": "http2priorityWriteSchedulerRFC7540.Pop"
},
{
"name": "http2priorityWriteSchedulerRFC9218.OpenStream"
},
{
"name": "http2priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "http2pseudoHeaderError.Error"
},
{
"name": "http2randomWriteScheduler.Pop"
},
{
"name": "http2requestBody.Close"
},
{
"name": "http2requestBody.Read"
},
{
"name": "http2responseWriter.Flush"
},
{
"name": "http2responseWriter.FlushError"
},
{
"name": "http2responseWriter.Push"
},
{
"name": "http2responseWriter.SetReadDeadline"
},
{
"name": "http2responseWriter.SetWriteDeadline"
},
{
"name": "http2responseWriter.Write"
},
{
"name": "http2responseWriter.WriteHeader"
},
{
"name": "http2responseWriter.WriteString"
},
{
"name": "http2roundRobinWriteScheduler.OpenStream"
},
{
"name": "http2roundRobinWriteScheduler.Pop"
},
{
"name": "http2serverConn.CloseConn"
},
{
"name": "http2serverConn.Flush"
},
{
"name": "http2stickyErrWriter.Write"
},
{
"name": "http2transportResponseBody.Close"
},
{
"name": "http2transportResponseBody.Read"
},
{
"name": "http2unencryptedTransport.RoundTrip"
},
{
"name": "http2writeData.String"
},
{
"name": "initALPNRequest.ServeHTTP"
},
{
"name": "loggingConn.Close"
},
{
"name": "loggingConn.Read"
},
{
"name": "loggingConn.Write"
},
{
"name": "maxBytesReader.Close"
},
{
"name": "maxBytesReader.Read"
},
{
"name": "onceCloseListener.Close"
},
{
"name": "persistConn.Read"
},
{
"name": "persistConnWriter.ReadFrom"
},
{
"name": "persistConnWriter.Write"
},
{
"name": "populateResponse.Write"
},
{
"name": "populateResponse.WriteHeader"
},
{
"name": "readTrackingBody.Close"
},
{
"name": "readTrackingBody.Read"
},
{
"name": "readWriteCloserBody.CloseWrite"
},
{
"name": "readWriteCloserBody.Read"
},
{
"name": "redirectHandler.ServeHTTP"
},
{
"name": "response.Flush"
},
{
"name": "response.FlushError"
},
{
"name": "response.Hijack"
},
{
"name": "response.ReadFrom"
},
{
"name": "response.Write"
},
{
"name": "response.WriteHeader"
},
{
"name": "response.WriteString"
},
{
"name": "serverHandler.ServeHTTP"
},
{
"name": "socksDialer.DialWithConn"
},
{
"name": "socksUsernamePassword.Authenticate"
},
{
"name": "stringWriter.WriteString"
},
{
"name": "timeoutHandler.ServeHTTP"
},
{
"name": "timeoutWriter.Write"
},
{
"name": "timeoutWriter.WriteHeader"
},
{
"name": "transportReadFromServerError.Error"
},
{
"name": "unencryptedHTTP2Request.ServeHTTP"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.26.9",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net/http/internal/http2",
"product": "net/http/internal/http2",
"programRoutines": [
{
"name": "outflow.add"
},
{
"name": "outflow.available"
},
{
"name": "outflow.setConnFlow"
},
{
"name": "outflow.take"
},
{
"name": "Server.serveConn"
},
{
"name": "serverConn.newStream"
},
{
"name": "serverConn.processSettingInitialWindowSize"
},
{
"name": "serverConn.processWindowUpdate"
},
{
"name": "serverConn.scheduleFrameWrite"
},
{
"name": "ClientConn.addStreamLocked"
},
{
"name": "Transport.newClientConn"
},
{
"name": "clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "clientConnReadLoop.processWindowUpdate"
},
{
"name": "clientConnReadLoop.streamByID"
},
{
"name": "clientStream.awaitFlowControl"
},
{
"name": "clientStream.cleanupWriteRequest"
},
{
"name": "FrameWriteRequest.Consume"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.Ping"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "ClientConn.Shutdown"
},
{
"name": "Framer.ReadFrame"
},
{
"name": "Framer.ReadFrameForHeader"
},
{
"name": "Framer.ReadFrameHeader"
},
{
"name": "Framer.WriteContinuation"
},
{
"name": "Framer.WriteData"
},
{
"name": "Framer.WriteDataPadded"
},
{
"name": "Framer.WriteGoAway"
},
{
"name": "Framer.WriteHeaders"
},
{
"name": "Framer.WritePing"
},
{
"name": "Framer.WritePriority"
},
{
"name": "Framer.WritePriorityUpdate"
},
{
"name": "Framer.WritePushPromise"
},
{
"name": "Framer.WriteRSTStream"
},
{
"name": "Framer.WriteRawFrame"
},
{
"name": "Framer.WriteSettings"
},
{
"name": "Framer.WriteSettingsAck"
},
{
"name": "Framer.WriteWindowUpdate"
},
{
"name": "NetHTTPClientConn.Close"
},
{
"name": "NetHTTPClientConn.Ping"
},
{
"name": "NetHTTPClientConn.RoundTrip"
},
{
"name": "ReadFrameHeader"
},
{
"name": "Server.GracefulShutdown"
},
{
"name": "Server.ServeConn"
},
{
"name": "SettingsFrame.ForeachSetting"
},
{
"name": "Transport.AddConn"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "Transport.RoundTripOpt"
},
{
"name": "bufferedWriter.Flush"
},
{
"name": "bufferedWriter.Write"
},
{
"name": "bufferedWriterTimeoutWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "clientConnPool.GetClientConn"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "noDialClientConnPool.GetClientConn"
},
{
"name": "priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "requestBody.Close"
},
{
"name": "responseWriter.Flush"
},
{
"name": "responseWriter.FlushError"
},
{
"name": "responseWriter.Push"
},
{
"name": "responseWriter.Write"
},
{
"name": "responseWriter.WriteHeader"
},
{
"name": "responseWriter.WriteString"
},
{
"name": "roundRobinWriteScheduler.Pop"
},
{
"name": "serve400Handler.ServeHTTP"
},
{
"name": "serverConn.Flush"
},
{
"name": "stickyErrWriter.Write"
},
{
"name": "transportResponseBody.Close"
},
{
"name": "transportResponseBody.Read"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.27.2",
"status": "affected",
"version": "1.27.0-0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/net/http2",
"product": "golang.org/x/net/http2",
"programRoutines": [
{
"name": "outflow.add"
},
{
"name": "outflow.available"
},
{
"name": "outflow.setConnFlow"
},
{
"name": "outflow.take"
},
{
"name": "Server.serveConn"
},
{
"name": "serverConn.newStream"
},
{
"name": "serverConn.processSettingInitialWindowSize"
},
{
"name": "serverConn.processWindowUpdate"
},
{
"name": "serverConn.scheduleFrameWrite"
},
{
"name": "ClientConn.addStreamLocked"
},
{
"name": "Transport.newClientConn"
},
{
"name": "clientConnReadLoop.processSettingsNoWrite"
},
{
"name": "clientConnReadLoop.processWindowUpdate"
},
{
"name": "clientConnReadLoop.streamByID"
},
{
"name": "clientStream.awaitFlowControl"
},
{
"name": "clientStream.cleanupWriteRequest"
},
{
"name": "FrameWriteRequest.Consume"
},
{
"name": "ClientConn.Close"
},
{
"name": "ClientConn.Ping"
},
{
"name": "ClientConn.RoundTrip"
},
{
"name": "ClientConn.Shutdown"
},
{
"name": "ConfigureServer"
},
{
"name": "ConfigureTransport"
},
{
"name": "ConfigureTransports"
},
{
"name": "ConnectionError.Error"
},
{
"name": "ErrCode.String"
},
{
"name": "FrameHeader.String"
},
{
"name": "FrameType.String"
},
{
"name": "FrameWriteRequest.String"
},
{
"name": "Framer.ReadFrame"
},
{
"name": "Framer.ReadFrameForHeader"
},
{
"name": "Framer.ReadFrameHeader"
},
{
"name": "Framer.WriteContinuation"
},
{
"name": "Framer.WriteData"
},
{
"name": "Framer.WriteDataPadded"
},
{
"name": "Framer.WriteGoAway"
},
{
"name": "Framer.WriteHeaders"
},
{
"name": "Framer.WritePing"
},
{
"name": "Framer.WritePriority"
},
{
"name": "Framer.WritePriorityUpdate"
},
{
"name": "Framer.WritePushPromise"
},
{
"name": "Framer.WriteRSTStream"
},
{
"name": "Framer.WriteRawFrame"
},
{
"name": "Framer.WriteSettings"
},
{
"name": "Framer.WriteSettingsAck"
},
{
"name": "Framer.WriteWindowUpdate"
},
{
"name": "GoAwayError.Error"
},
{
"name": "ReadFrameHeader"
},
{
"name": "Server.ServeConn"
},
{
"name": "Setting.String"
},
{
"name": "SettingID.String"
},
{
"name": "SettingsFrame.ForeachSetting"
},
{
"name": "StreamError.Error"
},
{
"name": "Transport.CloseIdleConnections"
},
{
"name": "Transport.NewClientConn"
},
{
"name": "Transport.RoundTrip"
},
{
"name": "Transport.RoundTripOpt"
},
{
"name": "bufferedWriter.Flush"
},
{
"name": "bufferedWriter.Write"
},
{
"name": "bufferedWriterTimeoutWriter.Write"
},
{
"name": "chunkWriter.Write"
},
{
"name": "clientConnPool.GetClientConn"
},
{
"name": "connError.Error"
},
{
"name": "dataBuffer.Read"
},
{
"name": "duplicatePseudoHeaderError.Error"
},
{
"name": "gzipReader.Close"
},
{
"name": "gzipReader.Read"
},
{
"name": "headerFieldNameError.Error"
},
{
"name": "headerFieldValueError.Error"
},
{
"name": "netHTTPClientConn.Close"
},
{
"name": "netHTTPClientConn.RoundTrip"
},
{
"name": "noDialClientConnPool.GetClientConn"
},
{
"name": "noDialH2RoundTripper.NewClientConn"
},
{
"name": "noDialH2RoundTripper.RoundTrip"
},
{
"name": "pipe.Read"
},
{
"name": "priorityWriteSchedulerRFC7540.CloseStream"
},
{
"name": "priorityWriteSchedulerRFC7540.OpenStream"
},
{
"name": "priorityWriteSchedulerRFC7540.Pop"
},
{
"name": "priorityWriteSchedulerRFC9218.OpenStream"
},
{
"name": "priorityWriteSchedulerRFC9218.Pop"
},
{
"name": "pseudoHeaderError.Error"
},
{
"name": "randomWriteScheduler.Pop"
},
{
"name": "requestBody.Close"
},
{
"name": "requestBody.Read"
},
{
"name": "responseWriter.Flush"
},
{
"name": "responseWriter.FlushError"
},
{
"name": "responseWriter.Push"
},
{
"name": "responseWriter.SetReadDeadline"
},
{
"name": "responseWriter.SetWriteDeadline"
},
{
"name": "responseWriter.Write"
},
{
"name": "responseWriter.WriteHeader"
},
{
"name": "responseWriter.WriteString"
},
{
"name": "roundRobinWriteScheduler.OpenStream"
},
{
"name": "roundRobinWriteScheduler.Pop"
},
{
"name": "serverConn.CloseConn"
},
{
"name": "serverConn.Flush"
},
{
"name": "stickyErrWriter.Write"
},
{
"name": "transportResponseBody.Close"
},
{
"name": "transportResponseBody.Read"
},
{
"name": "unencryptedTransport.RoundTrip"
},
{
"name": "writeData.String"
}
],
"vendor": "golang.org/x/net",
"versions": [
{
"lessThan": "0.60.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Jakub Ciolek (https://ciolek.dev)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-405: Asymmetric Resource Consumption (Amplification)",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-08T22:53:59.530Z",
"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/cl/847186"
},
{
"url": "https://go.dev/cl/847308"
},
{
"url": "https://go.dev/issue/81742"
},
{
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"url": "https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-6611"
}
],
"title": "Excessive CPU consumption from repeated initial window changes in net/http"
}
},
"cveMetadata": {
"assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"assignerShortName": "Go",
"cveId": "CVE-2026-78669",
"datePublished": "2026-10-08T22:53:59.530Z",
"dateReserved": "2026-08-24T23:36:15.739Z",
"dateUpdated": "2026-10-09T16:32:57.198Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…