CVE-2026-27141 (GCVE-0-2026-27141)

Vulnerability from cvelistv5 – Published: 2026-02-26 18:50 – Updated: 2026-02-27 19:11
VLAI?
Title
Sending certain HTTP/2 frames can cause a server to panic in golang.org/x/net
Summary
Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Go
References
Impacted products
Vendor Product Version
golang.org/x/net golang.org/x/net/http2 Affected: 0.50.0 , < 0.51.0 (semver)
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              "baseSeverity": "HIGH",
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              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/net/http2",
          "product": "golang.org/x/net/http2",
          "programRoutines": [
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              "name": "Framer.ReadFrameHeader"
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            {
              "name": "Framer.WriteContinuation"
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              "name": "Framer.WriteData"
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            {
              "name": "Framer.WriteDataPadded"
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            {
              "name": "Framer.WriteGoAway"
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            {
              "name": "Framer.WriteHeaders"
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            {
              "name": "Framer.WritePing"
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            {
              "name": "Framer.WritePriority"
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            {
              "name": "Framer.WritePriorityUpdate"
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            {
              "name": "Framer.WritePushPromise"
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            {
              "name": "Framer.WriteRSTStream"
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            {
              "name": "Framer.WriteRawFrame"
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            {
              "name": "Framer.WriteSettings"
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            {
              "name": "Framer.WriteSettingsAck"
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            {
              "name": "Framer.WriteWindowUpdate"
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            {
              "name": "GoAwayError.Error"
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            {
              "name": "ReadFrameHeader"
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            {
              "name": "Server.ServeConn"
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            {
              "name": "Setting.String"
            },
            {
              "name": "SettingID.String"
            },
            {
              "name": "SettingsFrame.ForeachSetting"
            },
            {
              "name": "StreamError.Error"
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            {
              "name": "Transport.CloseIdleConnections"
            },
            {
              "name": "Transport.NewClientConn"
            },
            {
              "name": "Transport.RoundTrip"
            },
            {
              "name": "Transport.RoundTripOpt"
            },
            {
              "name": "bufferedWriter.Flush"
            },
            {
              "name": "bufferedWriter.Write"
            },
            {
              "name": "bufferedWriterTimeoutWriter.Write"
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            {
              "name": "chunkWriter.Write"
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              "name": "clientConnPool.GetClientConn"
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              "name": "connError.Error"
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            {
              "name": "dataBuffer.Read"
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              "name": "duplicatePseudoHeaderError.Error"
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            {
              "name": "gzipReader.Close"
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            {
              "name": "gzipReader.Read"
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            {
              "name": "headerFieldNameError.Error"
            },
            {
              "name": "headerFieldValueError.Error"
            },
            {
              "name": "netHTTPClientConn.Close"
            },
            {
              "name": "netHTTPClientConn.RoundTrip"
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              "name": "noDialClientConnPool.GetClientConn"
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              "name": "noDialH2RoundTripper.NewClientConn"
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              "name": "priorityWriteSchedulerRFC7540.CloseStream"
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              "name": "priorityWriteSchedulerRFC7540.OpenStream"
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            {
              "name": "pseudoHeaderError.Error"
            },
            {
              "name": "requestBody.Close"
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            {
              "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": "serverConn.CloseConn"
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              "name": "serverConn.Flush"
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              "name": "stickyErrWriter.Write"
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              "name": "transportResponseBody.Close"
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              "name": "transportResponseBody.Read"
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      },
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        },
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          "url": "https://go.dev/cl/746180"
        },
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          "url": "https://go.dev/issue/77652"
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    "state": "PUBLISHED"
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}


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Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.