Distrust compromised intermediate certificates in crypto/x509
Summary
| CVE | CVE-2026-111943 |
|---|---|
| State | PUBLISHED |
| Assigner | Go |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-21 01:17:20 UTC |
| Updated | 2026-10-21 02:17:06 UTC |
| Description | 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. |
Risk And Classification
Problem Types: CWE-299: Improper Check for Certificate Revocation
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Go Standard Library | Crypto/x509 | affected 1.26.10 semver | Not specified |
| CNA | Go Standard Library | Crypto/x509 | affected 1.27.0-0 1.27.3 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| pkg.go.dev/vuln/GO-2026-6809 | [email protected] | pkg.go.dev | |
| groups.google.com/g/golang-announce/c/66pojueaQek | [email protected] | groups.google.com | |
| www.openwall.com/lists/oss-security/2026/10/20/29 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | |
| go.dev/issue/82345 | [email protected] | go.dev | |
| go.dev/cl/851047 | [email protected] | go.dev | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.