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CVE-2026-111943VulnerabilityPublished Updated

Bundesamt für Sicherheit in der Informationstechnik Amazon · Golang Go: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Affects Bundesamt für Sicherheit in der Informationstechnik AmazonSource 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, 12:05 UTC

Severity
Medium

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

EPSS
0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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 crypto/x509 to 1.27.3 or 1.26.10.

Affected software

ProductAffectedFixed in
Go standard librarycrypto/x509Affected
  • >=1.27.0-0 <1.27.3
Fixed in
  • 1.27.3
Go standard librarycrypto/x509Affected
  • <1.26.10
Fixed in
  • 1.26.10
Gocrypto/x509pkg:golang/crypto/x509Other 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

Red Hat has released updated Go packages (version 1.26.10+1) for Red Hat Enterprise Linux 9 and Hardened Images RPMs that include the fix for CVE-2026-111943. Users should apply these official updates promptly to mitigate the vulnerability. Detailed update instructions are available in the Red Hat advisories at https://access.redhat.com/articles/11258 and https://images.redhat.com/. No additional mitigation actions are indicated beyond applying the vendor-provided patches.

Description

A security vulnerability identified as CVE-2026-111943 affects the Go programming language's crypto/x509 package. This issue involves security concerns related to a specific Certificate Authority. Red Hat has released updates to mitigate this vulnerability as part of Go version 1.26.10+1 in Red Hat Enterprise Linux 9 and Hardened Images RPMs. The update addresses this and other related security issues, providing important fixes to prevent potential denial of service and certificate validation problems.

References

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