Improper Check for Certificate Revocation Affecting std/crypto/x509 package, versions <1.26.10>=1.27.0-0 <1.27.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-STDCRYPTOX509-21400137
- published21 Oct 2026
- disclosed20 Oct 2026
- creditUnknown
Introduced: 20 Oct 2026
NewCVE-2026-111943 (opens in a new tab)How to fix?
Upgrade std/crypto/x509 to version 1.26.10, 1.27.3 or higher.
Overview
std/crypto/x509 is a Go standard library package std/crypto/x509
Affected versions of this package are vulnerable to Improper Check for Certificate Revocation.
Go Vulnerability Report:
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.