Vulnerability-Lookup

OPENSUSE-SU-2026:22064-1

Vulnerability from csaf_opensuse - Published: 2026-10-09 06:33 - Updated: 2026-10-19 17:24

Summary

Security update for cosign

Severity

Important

Notes

Title of the patch: Security update for cosign

Description of the patch: This update for cosign fixes the following issues: - CVE-2026-56852: golang.org/x/text/unicode/norm: infinite loop on truncated/invalid UTF-8 input (bsc#1272117). - CVE-2026-56854,CVE-2026-56855,CVE-2026-78662: golang.org/x/crypto/ssh: authentication bypass and deadlocks in the crypto/ssh library (bsc#1278614). - CVE-2026-56864: x/mod/sumdb: ignore unrelated, unauthenticated hashes in Lookup (bsc#1275025). - CVE-2026-84304: google.golang.org/grpc: heap memory exhaustion via HTTP/2 DATA frame fragmentation (bsc#1279215). - Verification bypass via public key in legacy bundle (bsc#1282542). Changes for cosign: - update to 3.1.3 (bsc#1282542, GHSA-fx35-mq7g-6g98): * This release resolves GHSA-fx35-mq7g-6g98, a verification bypass using an unexpected public key in a legacy bundle. * Auto-detect default digest algorithm for public keys * fix(pkcs11key): return an error instead of panicking when no key pair matches * Supporting OCI Signing with X.509 Certificate Chain * test(inspect): replace mock TSA client usage with local timestamp response generator in * fix: prevent shell completions for various options not taking filenames * fix(blob): compare file checksums case-insensitively in * Verification bypass via public key in legacy bundle (GHSA- fx35-mq7g-6g98)

Patchnames: openSUSE-Leap-16.0-1877

CVE-2026-56852

5.9 (Medium)


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

Affected products

Recommended 7 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:cosign-0:3.1.3-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:cosign-0:3.1.3-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:cosign-0:3.1.3-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:cosign-0:3.1.3-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:cosign-bash-completion-0:3.1.3-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:cosign-fish-completion-0:3.1.3-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:cosign-zsh-completion-0:3.1.3-160000.1.1.noarch	—	Vendor Fix

Threats

Impact moderate

CVE-2026-56854

8.1 (High)


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

Affected products

Recommended 7 products, the same list as for CVE-2026-56852

Threats

Impact important

CVE-2026-56855

7.5 (High)


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

Affected products

Recommended 7 products, the same list as for CVE-2026-56852

Threats

Impact important

CVE-2026-56864

5.3 (Medium)


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

Affected products

Recommended 7 products, the same list as for CVE-2026-56852

Threats

Impact moderate

CVE-2026-78662

7.5 (High)


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

Affected products

Recommended 7 products, the same list as for CVE-2026-56852

Threats

Impact important

CVE-2026-84304

7.5 (High)


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

Affected products

Recommended 7 products, the same list as for CVE-2026-56852

Threats

Impact important

References

30 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1272117	self
https://bugzilla.suse.com/1275025	self
https://bugzilla.suse.com/1278614	self
https://bugzilla.suse.com/1279215	self
https://bugzilla.suse.com/1282542	self
https://www.suse.com/security/cve/CVE-2026-56852/	self
https://www.suse.com/security/cve/CVE-2026-56854/	self
https://www.suse.com/security/cve/CVE-2026-56855/	self
https://www.suse.com/security/cve/CVE-2026-56864/	self
https://www.suse.com/security/cve/CVE-2026-78662/	self
https://www.suse.com/security/cve/CVE-2026-84304/	self
https://www.suse.com/security/cve/CVE-2026-56852	external
https://bugzilla.suse.com/1271661	external
https://bugzilla.suse.com/1280553	external
https://www.suse.com/security/cve/CVE-2026-56854	external
https://bugzilla.suse.com/1278446	external
https://bugzilla.suse.com/1280553	external
https://www.suse.com/security/cve/CVE-2026-56855	external
https://bugzilla.suse.com/1278446	external
https://bugzilla.suse.com/1280553	external
https://www.suse.com/security/cve/CVE-2026-56864	external
https://bugzilla.suse.com/1275025	external
https://www.suse.com/security/cve/CVE-2026-78662	external
https://bugzilla.suse.com/1278446	external
https://bugzilla.suse.com/1280553	external
https://www.suse.com/security/cve/CVE-2026-84304	external
https://bugzilla.suse.com/1278271	external
https://bugzilla.suse.com/1280553	external

JSON

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      "title": "CVE-2026-84304"
    }
  ]
}

CVE-2026-56852 (GCVE-0-2026-56852)

Vulnerability from cvelistv5 – Published: 2026-07-21 19:18 – Updated: 2026-08-10 22:57

Title

Infinite loop on invalid input in golang.org/x/text

Summary

A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 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 2026-07-23 13:26 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 74 records in the last 180 days details

References

3 references

URL	Tags
https://go.dev/issue/80142
https://go.dev/cl/794100
https://pkg.go.dev/vuln/GO-2026-5970

Impacted products

1 product

Vendor	Product	Version
golang.org/x/text	golang.org/x/text/unicode/norm	Affected: 0 , < 0.39.0 (semver)

Credits

Viky Choi ("vikychoi" on GitHub)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/text/unicode/norm",
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              "name": "nextComposed"
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              "name": "Form.IsNormal"
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              "name": "Form.NextBoundary"
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              "name": "Form.NextBoundaryInString"
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              "name": "Form.Properties"
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            {
              "name": "Form.PropertiesString"
            },
            {
              "name": "Form.QuickSpan"
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            {
              "name": "Form.QuickSpanString"
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              "name": "Form.Span"
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            {
              "name": "Form.SpanString"
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              "name": "Form.String"
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            {
              "name": "Form.Transform"
            },
            {
              "name": "Iter.Init"
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            {
              "name": "Iter.InitString"
            },
            {
              "name": "Iter.Next"
            },
            {
              "name": "Iter.Seek"
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              "name": "normReader.Read"
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            {
              "name": "normWriter.Write"
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          ],
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              "lessThan": "0.39.0",
              "status": "affected",
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              "versionType": "semver"
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          "lang": "en",
          "value": "Viky Choi (\"vikychoi\" on GitHub)"
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      "title": "Infinite loop on invalid input in golang.org/x/text"
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}

CVE-2026-56854 (GCVE-0-2026-56854)

Vulnerability from cvelistv5 – Published: 2026-08-28 15:14 – Updated: 2026-08-28 20:17

Title

Source-address critical option not enforced for non-public-key auth callbacks in golang.org/x/crypto/ssh

Summary

The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 20:16 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 74 records in the last 180 days details

References

3 references

URL	Tags
https://go.dev/issue/80213
https://go.dev/cl/797040
https://pkg.go.dev/vuln/GO-2026-6303

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.55.0 (semver)

Credits

Longwei Wang (@gn00295120)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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      }
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        }
      ],
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        "dateUpdated": "2026-08-28T15:14:26.918Z",
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          "url": "https://pkg.go.dev/vuln/GO-2026-6303"
        }
      ],
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CVE-2026-56855 (GCVE-0-2026-56855)

Vulnerability from cvelistv5 – Published: 2026-09-02 19:37 – Updated: 2026-09-03 14:14

Title

Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh

Summary

Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.

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 2026-09-03 14:13 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 74 records in the last 180 days details

References

4 references

URL	Tags
https://go.dev/issue/81317
https://go.dev/cl/826524
https://groups.google.com/g/golang-announce/c/1y3…
https://pkg.go.dev/vuln/GO-2026-6355

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.56.0 (semver)

Credits

Will Mortensen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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          ],
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        }
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              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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      "providerMetadata": {
        "dateUpdated": "2026-09-02T19:37:05.807Z",
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        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6355"
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      "title": "Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh"
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}

CVE-2026-56864 (GCVE-0-2026-56864)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 16:16

Title

Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb

Summary

A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 16:16 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 74 records in the last 180 days details

References

5 references

URL	Tags
https://go.dev/issue/80745
https://groups.google.com/g/golang-announce/c/94p…
https://go.dev/cl/815000
https://go.dev/cl/815020
https://pkg.go.dev/vuln/GO-2026-6180

Impacted products

2 products

Vendor	Product	Version
Go toolchain	cmd/go	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)
golang.org/x/mod	golang.org/x/mod/sumdb	Affected: 0 , < 0.40.0 (semver)

Credits

mundur

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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    ],
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              "status": "affected",
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      "credits": [
        {
          "lang": "en",
          "value": "mundur"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "value": "A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log. In order to determine if you have been affected:   rm -r go.sum go.work.sum vendor/ \u0026\u0026 go mod tidy"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.605Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/80745"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://go.dev/cl/815000"
        },
        {
          "url": "https://go.dev/cl/815020"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6180"
        }
      ],
      "title": "Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-56864",
    "datePublished": "2026-08-13T21:58:53.605Z",
    "dateReserved": "2026-06-23T15:10:49.354Z",
    "dateUpdated": "2026-08-14T16:16:42.248Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-78662 (GCVE-0-2026-78662)

Vulnerability from cvelistv5 – Published: 2026-09-02 19:37 – Updated: 2026-09-03 13:20

Title

Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh

Summary

Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 13:19 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 74 records in the last 180 days details

References

4 references

URL	Tags
https://go.dev/issue/81316
https://go.dev/cl/826504
https://groups.google.com/g/golang-announce/c/1y3…
https://pkg.go.dev/vuln/GO-2026-6354

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.56.0 (semver)

Credits

Will Mortensen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
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                "id": "CVE-2026-78662",
                "options": [
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              },
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            }
          }
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        "problemTypes": [
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            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-03T13:20:12.263Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "channel.handlePacket"
            },
            {
              "name": "channel.responseMessageReceived"
            },
            {
              "name": "channel.Accept"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewControlClientConn"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.56.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Will Mortensen"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, a channel registered in the mux\u0027s chanList is not usable until it is established. A malicious peer was able flood the channel\u0027s incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-02T19:37:05.741Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/81316"
        },
        {
          "url": "https://go.dev/cl/826504"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/1y3fb2np35U"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6354"
        }
      ],
      "title": "Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-78662",
    "datePublished": "2026-09-02T19:37:05.741Z",
    "dateReserved": "2026-08-24T23:36:15.738Z",
    "dateUpdated": "2026-09-03T13:20:12.263Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-84304 (GCVE-0-2026-84304)

Vulnerability from cvelistv5 – Published: 2026-09-01 18:19 – Updated: 2026-09-01 19:24

Title

gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION. This issue is fixed in version 1.83.1.

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: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 19:23 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7634 records in the last 180 days details

References

6 references

URL	Tags
https://github.com/grpc/grpc-go/security/advisori…	x_refsource_CONFIRM
https://github.com/grpc/grpc-go/pull/9331	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9333	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/7354d9c8de…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/8cfeca0e1e…	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.83.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
grpc	grpc-go	Affected: < 1.83.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-84304",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T19:23:26.130673Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-01T19:24:36.867Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "grpc-go",
          "vendor": "grpc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.83.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION. This issue is fixed in version 1.83.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
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            "vulnIntegrityImpact": "NONE"
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      },
      "references": [
        {
          "name": "https://github.com/grpc/grpc-go/security/advisories/GHSA-vp52-pcj8-j9qc",
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          ],
          "url": "https://github.com/grpc/grpc-go/security/advisories/GHSA-vp52-pcj8-j9qc"
        },
        {
          "name": "https://github.com/grpc/grpc-go/pull/9331",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-go/pull/9331"
        },
        {
          "name": "https://github.com/grpc/grpc-go/pull/9333",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-go/pull/9333"
        },
        {
          "name": "https://github.com/grpc/grpc-go/commit/7354d9c8debb4bcf2225bf429857078de310c176",
          "tags": [
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          ],
          "url": "https://github.com/grpc/grpc-go/commit/7354d9c8debb4bcf2225bf429857078de310c176"
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        {
          "name": "https://github.com/grpc/grpc-go/commit/8cfeca0e1ee5ea0980dcc320e20240fa1079ec77",
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          "url": "https://github.com/grpc/grpc-go/commit/8cfeca0e1ee5ea0980dcc320e20240fa1079ec77"
        },
        {
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          "url": "https://github.com/grpc/grpc-go/releases/tag/v1.83.1"
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      ],
      "source": {
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    "datePublished": "2026-09-01T18:19:10.100Z",
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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.

Action not permitted

OPENSUSE-SU-2026:22064-1

CVE-2026-56852 (GCVE-0-2026-56852)

CVE-2026-56854 (GCVE-0-2026-56854)

CVE-2026-56855 (GCVE-0-2026-56855)

CVE-2026-56864 (GCVE-0-2026-56864)

CVE-2026-78662 (GCVE-0-2026-78662)

CVE-2026-84304 (GCVE-0-2026-84304)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour