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VulnerabilityPublished

CVE-2026-111943: Golang · Distrust compromised intermediate certificates in crypto/x509

Affects golangSource GCVE Database

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Authoritative record:CVE-2026-111943· Medium

Not known to be exploited : upgrade to 1.27.3 or 1.26.10 when convenient.

Data as of 29 Oct 2026, 13:33 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch
Available – fixed in 1.27.3, 1.26.10

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade golang to 1.27.3 or 1.26.10.

Affected software

ProductAffectedFixed in
Bitnamigolangpkg:bitnami/golangOther threatsAffected
  • <1.26.10
  • >=1.27.0-0 <1.27.3
Fixed in
  • 1.26.10
  • 1.27.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the official fixes by upgrading to Go versions 1.26.10 or 1.27.3 or later. These versions include the denylist in crypto/x509 that rejects compromised intermediate certificates. No additional action is required if using these or later versions.

Description

A vulnerability in the Go programming language's crypto/x509 package involves distrust of certain compromised intermediate certificates. While Go typically relies on system root certificates, some environments may not update trust stores automatically. To mitigate this, a denylist was added to reject verification attempts involving these untrustworthy intermediate certificates.

References

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