CVE-2026-111943 (GCVE-0-2026-111943)
Vulnerability from cvelistv5
Published
2026-10-21 00:52
Modified
2026-10-21 01:24
Severity ?
CWE
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.
References
Impacted products
Vendor Product Version
Go standard library crypto/x509 Version: 0   ≤
Version: 1.27.0-0   ≤
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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-21T01:24:20.498Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/20/29"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/x509",
          "product": "crypto/x509",
          "programRoutines": [
            {
              "name": "Certificate.Verify"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.26.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-299: Improper Check for Certificate Revocation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "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"
}


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