CVE-2026-27138

Panic in name constraint checking for malformed certificates in crypto/x509

CVSS 5.9 MEDIUMEPSS 0.4%

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Produtos afetados

Go standard library · crypto/x509

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Referências

https://go.dev/cl/752183 https://go.dev/issue/77953 https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk https://pkg.go.dev/vuln/GO-2026-4600