CVE-2026-33810highCWE-1289

CVE-2026-33810: fallo de gravedad alta en Go standard library crypto/x509

Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear crypto/x509+ Monitorear go

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 7.5epss 0.3%
When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Productos afectados
Go standard library · crypto/x509
CVEs relacionadas — Go standard library crypto/x509

En el mismo producto, de las más peligrosas a las menos.

CVE-2024-24783MEDIUMVerify panics on certificates with an unknown public key algorithm in crypto/x509EPSS 0.7%CVE-2026-27137HIGHIncorrect enforcement of email constraints in crypto/x509EPSS 0.7%CVE-2026-32280HIGHUnexpected work during chain building in crypto/x509EPSS 0.6%CVE-2025-22865HIGHParsePKCS1PrivateKey panic with partial keys in crypto/x509EPSS 0.6%CVE-2026-27145MEDIUMInefficient candidate hostname parsing in crypto/x509EPSS 0.6%CVE-2024-45341MEDIUMUsage of IPv6 zone IDs can bypass URI name constraints in crypto/x509EPSS 0.6%