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

Vulnerability from cvelistv5 – Published: 2026-10-21 00:52 – Updated: 2026-10-21 01:24
VLAI
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 74 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Go standard library crypto/x509 Affected: 0 , < 1.26.10 (semver)
Affected: 1.27.0-0 , < 1.27.3 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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        {
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      "title": "Distrust compromised intermediate certificates in crypto/x509"
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                "defaultStatus": "unaffected",
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        ],
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        "lastModified": "2026-10-21T02:17:06.710",
        "metrics": {},
        "published": "2026-10-21T01:17:20.797",
        "references": [
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      "source": "Red Hat CSAF VEX",
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      "title": "crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111943.json",
      "version": "3"
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}



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