Vulnerability-Lookup

RHSA-2026:91646

Vulnerability from csaf_redhat - Published: 2026-10-28 11:36 - Updated: 2026-10-29 15:27

Summary

Red Hat Security Advisory: osbuild-composer security update

Severity

Important

Notes

Topic: An update for osbuild-composer is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building images for local usage, it can also upload images directly to cloud. It is compatible with composer-cli and cockpit-composer clients. Security Fix(es): * go.mongodb.org/mongo-driver: go.mongodb.org/mongo-driver/v2: MongoDB Go Driver: Data deletion via query-operator injection in GridFS file IDs (CVE-2026-88031) * google.golang.org/grpc: gRPC-Go: Denial of Service via malformed RPC requests (CVE-2026-84445) * net/http: golang: golang: Denial of Service via crafted HTTP Range headers (CVE-2026-78667) * crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031) * net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing (CVE-2026-94440) * net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames (CVE-2026-78669) * crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates (CVE-2026-111943) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-78667

A flaw was found in the Go net/http package. A remote attacker can cause a Denial of Service (DoS) by sending an HTTP request containing a Range header with a large number of small byte ranges. When the server processes these ranges while serving content, it consumes an excessive amount of CPU resources, rendering the application unresponsive to legitimate users.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 29 products

Product	Version	Remediation
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-0:134.1-13.el10_0.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-0:134.1-13.el10_0.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-0:134.1-13.el10_0.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-0:134.1-13.el10_0.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-0:134.1-13.el10_0.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-0:134.1-13.el10_0.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-0:134.1-13.el10_0.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-0:134.1-13.el10_0.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-0:134.1-13.el10_0.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-debuginfo-0:134.1-13.el10_0.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-debuginfo-0:134.1-13.el10_0.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-debuginfo-0:134.1-13.el10_0.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-core-debuginfo-0:134.1-13.el10_0.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-debugsource-0:134.1-13.el10_0.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-debugsource-0:134.1-13.el10_0.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-debugsource-0:134.1-13.el10_0.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-debugsource-0:134.1-13.el10_0.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-tests-debuginfo-0:134.1-13.el10_0.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-tests-debuginfo-0:134.1-13.el10_0.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-tests-debuginfo-0:134.1-13.el10_0.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-tests-debuginfo-0:134.1-13.el10_0.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-0:134.1-13.el10_0.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-0:134.1-13.el10_0.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-0:134.1-13.el10_0.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-0:134.1-13.el10_0.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-debuginfo-0:134.1-13.el10_0.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-debuginfo-0:134.1-13.el10_0.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-debuginfo-0:134.1-13.el10_0.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:osbuild-composer-worker-debuginfo-0:134.1-13.el10_0.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Important

CVE-2026-78669

A flaw was found in the Go net/http package. This flaw allows a remote attacker to cause a Denial of Service (DoS) by triggering excessive CPU consumption on an affected client or server. By opening a large number of HTTP/2 streams and repeatedly sending small configuration (SETTINGS) frames that modify window sizes, an attacker forces the system into intensive state processing. This resource exhaustion degrades performance and can render the service unresponsive.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 29 products, the same list as for CVE-2026-78667

Threats

Impact Important

CVE-2026-84445

A flaw was found in gRPC-Go. Servers created with xds.NewGRPCServer() can be exploited by a remote client sending a malformed RPC request that lacks the required :authority or Host headers. This can trigger an index-out-of-bounds panic, leading to the termination of the entire server process and a Denial of Service (DoS). In some deployments, this attack can be unauthenticated.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-125 - Out-of-bounds Read

Affected products

Fixed 29 products, the same list as for CVE-2026-78667

Threats

Impact Important

CVE-2026-88031

A flaw was found in go.mongodb.org/mongo-driver for version < 1.17.10 and < 2.9.1. Improper handling of data query elements in the GridFS component can lead to a file identifier being misinterpreted as a query. An authenticated user can exploit this to delete all GridFS file chunks, making stored file content unreadable, resulting in a denial of service.

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CWE-1287 - Improper Validation of Specified Type of Input

Affected products

Fixed 29 products, the same list as for CVE-2026-78667

Threats

Impact Important

CVE-2026-94440

A flaw was found in the mime/multipart and net/textproto packages in Go. A remote attacker could exploit this vulnerability by submitting a crafted multipart form request that bypasses configured memory limits when the remaining boundary limit is small. This issue allows the application to read an arbitrarily long line into memory, leading to excessive resource consumption and a Denial of Service (DoS).

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 29 products, the same list as for CVE-2026-78667

Threats

Impact Moderate

CVE-2026-97031

A flaw was found in crypto/tls. A remote attacker can trigger this vulnerability by sending a specially crafted packet containing multiple Encrypted Client Hello (ECH) outer extension references to a server. Processing these unauthorized references leads to excessive memory consumption, causing a Denial of Service (DoS) through server crashes or unresponsiveness.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 29 products, the same list as for CVE-2026-78667

Threats

Impact Important

CVE-2026-111943

A flaw was found in Go's crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.

6.8 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE-295 - Improper Certificate Validation

Affected products

Fixed 29 products, the same list as for CVE-2026-78667

Threats

Impact Important

References

69 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:91646	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2531587	external
https://bugzilla.redhat.com/show_bug.cgi?id=2533175	external
https://bugzilla.redhat.com/show_bug.cgi?id=2548334	external
https://bugzilla.redhat.com/show_bug.cgi?id=2548336	external
https://bugzilla.redhat.com/show_bug.cgi?id=2548341	external
https://bugzilla.redhat.com/show_bug.cgi?id=2548344	external
https://bugzilla.redhat.com/show_bug.cgi?id=2556068	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-78667	self
https://bugzilla.redhat.com/show_bug.cgi?id=2548334	external
https://www.cve.org/CVERecord?id=CVE-2026-78667	external
https://nvd.nist.gov/vuln/detail/CVE-2026-78667	external
https://go.dev/cl/847309	external
https://go.dev/issue/81858	external
https://groups.google.com/g/golang-announce/c/U2f…	external
https://pkg.go.dev/vuln/GO-2026-6609	external
https://access.redhat.com/security/cve/CVE-2026-78669	self
https://bugzilla.redhat.com/show_bug.cgi?id=2548344	external
https://www.cve.org/CVERecord?id=CVE-2026-78669	external
https://nvd.nist.gov/vuln/detail/CVE-2026-78669	external
https://go.dev/cl/847186	external
https://go.dev/cl/847308	external
https://go.dev/issue/81742	external
https://groups.google.com/g/golang-announce/c/ZPw…	external
https://pkg.go.dev/vuln/GO-2026-6611	external
https://access.redhat.com/security/cve/CVE-2026-84445	self
https://bugzilla.redhat.com/show_bug.cgi?id=2533175	external
https://www.cve.org/CVERecord?id=CVE-2026-84445	external
https://nvd.nist.gov/vuln/detail/CVE-2026-84445	external
https://github.com/grpc/grpc-go/commit/3822494d8e…	external
https://github.com/grpc/grpc-go/commit/8668b69c16…	external
https://github.com/grpc/grpc-go/commit/93e31b4854…	external
https://github.com/grpc/grpc-go/issues/9354	external
https://github.com/grpc/grpc-go/pull/9365	external
https://github.com/grpc/grpc-go/pull/9366	external
https://github.com/grpc/grpc-go/pull/9367	external
https://github.com/grpc/grpc-go/releases/tag/v1.82.2	external
https://github.com/grpc/grpc-go/releases/tag/v1.83.2	external
https://github.com/grpc/grpc-go/security/advisori…	external
https://access.redhat.com/security/cve/CVE-2026-88031	self
https://bugzilla.redhat.com/show_bug.cgi?id=2531587	external
https://www.cve.org/CVERecord?id=CVE-2026-88031	external
https://nvd.nist.gov/vuln/detail/CVE-2026-88031	external
https://jira.mongodb.org/browse/GODRIVER-4081	external
https://www.mongodb.com/community/forums/t/mongod…	external
https://access.redhat.com/security/cve/CVE-2026-94440	self
https://bugzilla.redhat.com/show_bug.cgi?id=2548341	external
https://www.cve.org/CVERecord?id=CVE-2026-94440	external
https://nvd.nist.gov/vuln/detail/CVE-2026-94440	external
https://go.dev/cl/847307	external
https://go.dev/issue/81741	external
https://pkg.go.dev/vuln/GO-2026-6608	external
https://access.redhat.com/security/cve/CVE-2026-97031	self
https://bugzilla.redhat.com/show_bug.cgi?id=2548336	external
https://www.cve.org/CVERecord?id=CVE-2026-97031	external
https://nvd.nist.gov/vuln/detail/CVE-2026-97031	external
https://go.dev/cl/847312	external
https://go.dev/issue/81855	external
https://pkg.go.dev/vuln/GO-2026-6607	external
https://access.redhat.com/security/cve/CVE-2026-111943	self
https://bugzilla.redhat.com/show_bug.cgi?id=2556068	external
https://access.redhat.com/security/vulnerabilitie…	external
https://www.cve.org/CVERecord?id=CVE-2026-111943	external
https://nvd.nist.gov/vuln/detail/CVE-2026-111943	external
https://github.com/golang/go/issues/82345	external
https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU	external
https://pkg.go.dev/vuln/GO-2026-6809	external

JSON

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          "text": "A flaw was found in the Go net/http package. A remote attacker can cause a Denial of Service (DoS) by sending an HTTP request containing a Range header with a large number of small byte ranges. When the server processes these ranges while serving content, it consumes an excessive amount of CPU resources, rendering the application unresponsive to legitimate users.",
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          "text": "This vulnerability is rated with an Important severity for Red Hat products because an unauthenticated remote attacker can exhaust server compute resources over the network, leading to a complete service outage. Across Red Hat enterprise environments, Go is widely deployed in container runtimes, monitoring daemons, and OpenShift infrastructure components. However, exploitation is restricted to applications that actively listen on the network and serve content using standard library HTTP handlers that process multi-range requests. CLI utilities and server components that do not handle byte-range requests from untrusted clients remain unaffected.",
          "title": "Statement"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cwe": {
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          "text": "2548344"
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          "category": "description",
          "text": "A flaw was found in the Go net/http package. This flaw allows a remote attacker to cause a Denial of Service (DoS) by triggering excessive CPU consumption on an affected client or server. By opening a large number of HTTP/2 streams and repeatedly sending small configuration (SETTINGS) frames that modify window sizes, an attacker forces the system into intensive state processing. This resource exhaustion degrades performance and can render the service unresponsive.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A flaw was found in the Go net/http package and the golang.org/x/net/http2 module. A malicious HTTP/2 peer can cause excessive CPU consumption by opening a large number of HTTP/2 streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values. Each SETTINGS frame forces the server or client to iterate over all open streams to adjust their flow-control windows, resulting in quadratic CPU usage and denial of service.\n\nThis vulnerability affects all Go programs that serve or consume HTTP/2 traffic using net/http or golang.org/x/net/http2.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "summary": "https://go.dev/cl/847186",
          "url": "https://go.dev/cl/847186"
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          "summary": "https://go.dev/cl/847308",
          "url": "https://go.dev/cl/847308"
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          "url": "https://go.dev/issue/81742"
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          "summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
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          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "title": "Vulnerability description"
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          "text": "crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references",
          "title": "Vulnerability summary"
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          "text": "This vulnerability is rated as an Important severity flaw because an unauthenticated remote attacker can trigger memory exhaustion and crash server processes without requiring privileges or user interaction. Go applications that terminate TLS connections and accept Encrypted Client Hello configurations are vulnerable to resource amplification during the initial handshake. While the flaw does not facilitate arbitrary code execution or compromise data confidentiality, the resulting denial of service can disrupt critical network services.",
          "title": "Statement"
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}

CVE-2026-111943 (GCVE-0-2026-111943)

Vulnerability from cvelistv5 – Published: 2026-10-21 00:52 – Updated: 2026-10-21 01:24

Title

Distrust compromised intermediate certificates in crypto/x509

Summary

On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.

Severity

No CVSS data available.

CWE

CWE-299 - Improper Check for Certificate Revocation

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 76 records in the last 180 days details

References

5 references

URL	Tags
https://go.dev/cl/851047
https://go.dev/issue/82345
https://groups.google.com/g/golang-announce/c/66p…
https://pkg.go.dev/vuln/GO-2026-6809
http://www.openwall.com/lists/oss-security/2026/1…

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/x509	Affected: 0 , < 1.26.10 (semver) Affected: 1.27.0-0 , < 1.27.3 (semver)

Show details on NVD website

JSON

To clipboard

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        "dateUpdated": "2026-10-21T00:52:18.359Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/851047"
        },
        {
          "url": "https://go.dev/issue/82345"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/66pojueaQek"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6809"
        }
      ],
      "title": "Distrust compromised intermediate certificates in crypto/x509"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-111943",
    "datePublished": "2026-10-21T00:52:18.359Z",
    "dateReserved": "2026-10-17T13:43:28.599Z",
    "dateUpdated": "2026-10-21T01:24:20.498Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-78667 (GCVE-0-2026-78667)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-09 16:12

Title

Lack of limit on size of parsed Range headers in net/http

Summary

When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-09 16:12 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 76 records in the last 180 days details

References

4 references

URL	Tags
https://go.dev/cl/847309
https://go.dev/issue/81858
https://groups.google.com/g/golang-announce/c/U2f…
https://pkg.go.dev/vuln/GO-2026-6609

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/http	Affected: 0 , < 1.26.9 (semver) Affected: 1.27.0-0 , < 1.27.2 (semver)

Credits

Jakub Ciolek (https://ciolek.dev)

Show details on NVD website

JSON

To clipboard

{
  "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-2026-78667",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "yes"
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                    "Technical Impact": "partial"
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                "timestamp": "2026-10-09T16:12:49.383383Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
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            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-09T16:12:53.569Z",
          "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": [
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              "name": "parseRange"
            },
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              "name": "ServeContent"
            },
            {
              "name": "ServeFile"
            },
            {
              "name": "ServeFileFS"
            },
            {
              "name": "fileHandler.ServeHTTP"
            },
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              "name": "fileTransport.RoundTrip"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.26.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThan": "1.27.2",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jakub Ciolek (https://ciolek.dev)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-08T22:53:59.148Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
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          "url": "https://go.dev/issue/81858"
        },
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          "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6609"
        }
      ],
      "title": "Lack of limit on size of parsed Range headers in net/http"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
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    "datePublished": "2026-10-08T22:53:59.148Z",
    "dateReserved": "2026-08-24T23:36:15.738Z",
    "dateUpdated": "2026-10-09T16:12:53.569Z",
    "state": "PUBLISHED"
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}

CVE-2026-78669 (GCVE-0-2026-78669)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-09 16:32

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)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Go CNA under the Google root

CNA scorecard E 42/100 over 76 records in the last 180 days details

References

6 references

URL	Tags
https://go.dev/cl/847186
https://go.dev/cl/847308
https://go.dev/issue/81742
https://groups.google.com/g/golang-announce/c/U2f…
https://groups.google.com/g/golang-announce/c/ZPw…
https://pkg.go.dev/vuln/GO-2026-6611

Impacted products

3 products

Vendor	Product	Version
Go standard library	net/http	Affected: 0 , < 1.26.9 (semver)
Go standard library	net/http/internal/http2	Affected: 1.27.0-0 , < 1.27.2 (semver)
golang.org/x/net	golang.org/x/net/http2	Affected: 0 , < 0.60.0 (semver)

Credits

Jakub Ciolek (https://ciolek.dev)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
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              "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": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-10-09T16:32:53.872432Z",
                "version": "2.0.3"
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        "problemTypes": [
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            "descriptions": [
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                "cweId": "CWE-405",
                "description": "CWE-405 Asymmetric Resource Consumption (Amplification)",
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                "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"
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      "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."
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      ],
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      "providerMetadata": {
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        "shortName": "Go"
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      "references": [
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          "url": "https://go.dev/cl/847186"
        },
        {
          "url": "https://go.dev/cl/847308"
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        {
          "url": "https://go.dev/issue/81742"
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        {
          "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"
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      ],
      "title": "Excessive CPU consumption from repeated initial window changes in net/http"
    }
  },
  "cveMetadata": {
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    "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"
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  "dataType": "CVE_RECORD",
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}

CVE-2026-84445 (GCVE-0-2026-84445)

Vulnerability from cvelistv5 – Published: 2026-09-14 16:11 – Updated: 2026-09-14 16:36

Title

gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProcess in internal/xds/server/routing.go assumes that an authority value exists and indexes the empty slice. A remote client that can complete transport connection establishment can trigger an index-out-of-bounds panic that is not recovered by the per-RPC goroutine and terminates the entire server process. In insecure or ordinary TLS deployments the request can be unauthenticated, while strict mTLS or ALTS deployments require valid transport credentials before the malformed RPC can reach the interceptor. This issue is fixed in versions 1.82.2 and 1.83.2.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 16:36 UTC

CWE

CWE-129 - Improper Validation of Array Index
CWE-248 - Uncaught Exception

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7926 records in the last 180 days details

References

10 references

URL	Tags
https://github.com/grpc/grpc-go/security/advisori…	x_refsource_CONFIRM
https://github.com/grpc/grpc-go/issues/9354	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9365	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9366	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9367	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/3822494d8e…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/8668b69c16…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/93e31b4854…	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.82.2	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.83.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
grpc	grpc-go	Affected: < 1.82.2 Affected: >= 1.83.0, < 1.83.2

Show details on NVD website

JSON

To clipboard

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          "name": "https://github.com/grpc/grpc-go/pull/9367",
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          "url": "https://github.com/grpc/grpc-go/pull/9367"
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          "name": "https://github.com/grpc/grpc-go/commit/93e31b48545e2a8aaeb6e06b47fb249f94e6297f",
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          ],
          "url": "https://github.com/grpc/grpc-go/commit/93e31b48545e2a8aaeb6e06b47fb249f94e6297f"
        },
        {
          "name": "https://github.com/grpc/grpc-go/releases/tag/v1.82.2",
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          "url": "https://github.com/grpc/grpc-go/releases/tag/v1.82.2"
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        "advisory": "GHSA-2v4p-qf9q-27wj",
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CVE-2026-88031 (GCVE-0-2026-88031)

Vulnerability from cvelistv5 – Published: 2026-09-10 17:59 – Updated: 2026-09-10 18:25

Title

GridFS data deletion via query-operator injection in file IDs in the MongoDB Go Driver

Summary

Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB Go Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable.

Severity

6.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-10 18:25 UTC

CWE

CWE-943 - Improper Neutralization of Special Elements in Data Query Logic

Assigner

mongodb CNA under the mitre root

CNA scorecard C 70/100 over 222 records in the last 180 days details

References

1 reference

URL	Tags
https://jira.mongodb.org/browse/GODRIVER-4081

Impacted products

1 product

Vendor	Product	Version
MongoDB	Go Driver	Affected: 1.0.0 , < 1.17.10 (semver) Affected: 2.0.0 , < 2.9.1 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-94440 (GCVE-0-2026-94440)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-09 16:09

Title

Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart

Summary

Parsing a multipart form can bypass memory limits and read an arbitrarily long line into memory when the remaining limit at the start of a part is less than 400 bytes.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-09 16:09 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 76 records in the last 180 days details

References

4 references

URL	Tags
https://go.dev/cl/847307
https://go.dev/issue/81741
https://groups.google.com/g/golang-announce/c/U2f…
https://pkg.go.dev/vuln/GO-2026-6608

Impacted products

2 products

Vendor	Product	Version
Go standard library	net/textproto	Affected: 0 , < 1.26.9 (semver) Affected: 1.27.0-0 , < 1.27.2 (semver)
Go standard library	mime/multipart	Affected: 0 , < 1.26.9 (semver) Affected: 1.27.0-0 , < 1.27.2 (semver)

Credits

Jakub Ciolek (https://ciolek.dev)

Show details on NVD website

JSON

To clipboard

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CVE-2026-97031 (GCVE-0-2026-97031)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-09 15:59

Title

Reject malformed ECH outer extension references in crypto/tls

Summary

Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-09 15:59 UTC

CWE

CWE-405 - Asymmetric Resource Consumption
CWE-405 - Asymmetric Resource Consumption (Amplification)

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 76 records in the last 180 days details

References

4 references

URL	Tags
https://go.dev/cl/847312
https://go.dev/issue/81855
https://groups.google.com/g/golang-announce/c/U2f…
https://pkg.go.dev/vuln/GO-2026-6607

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/tls	Affected: 0 , < 1.26.9 (semver) Affected: 1.27.0-0 , < 1.27.2 (semver)

Show details on NVD website

JSON

To clipboard

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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

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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.

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.

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RHSA-2026:91646

CVE-2026-111943 (GCVE-0-2026-111943)

CVE-2026-78667 (GCVE-0-2026-78667)

CVE-2026-78669 (GCVE-0-2026-78669)

CVE-2026-84445 (GCVE-0-2026-84445)

CVE-2026-88031 (GCVE-0-2026-88031)

CVE-2026-94440 (GCVE-0-2026-94440)

CVE-2026-97031 (GCVE-0-2026-97031)

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