CVE-2026-27138

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

CVSS 5.9 MEDIUMEPSS 0.4%

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 5.9EPSS 0.4%KEV nãoPoC —Patch —

Ciclo de vida

06 mar 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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