Uncaught Exception Affecting std/crypto/x509 package, versions >=1.26.0-0 <1.26.1
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-STDCRYPTOX509-15440729
- published9 Mar 2026
- disclosed6 Mar 2026
- creditJakub Ciolek
Introduced: 6 Mar 2026
CVE-2026-27138 (opens in a new tab)How to fix?
Upgrade std/crypto/x509 to version 1.26.1 or higher.
Overview
std/crypto/x509 is a Go standard library package std/crypto/x509
Affected versions of this package are vulnerable to Uncaught Exception.
Go Vulnerability Report:
Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS.