CVE-2026-111943: Golang · Distrust compromised intermediate certificates in crypto/x509
Affects golangSource GCVE Database
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
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
Disclosed: evidence found.
CVE published 21 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
Bitnamigolangpkg:bitnami/golangOther threats | Affected
| Fixed in
|
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
- openwall.com/lists/oss-security/2026/10/20/29 (opens in a new tab)
- go.dev/cl/851047 (opens in a new tab)
- go.dev/issue/82345 (opens in a new tab)
- groups.google.com/g/golang-announce/c/66pojueaQek (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-111943 (opens in a new tab)
- pkg.go.dev/vuln/GO-2026-6809 (opens in a new tab)