Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509 (Go standard library crypto/x509)

CVE-2026-33810
HIGH 7.5

En bref

Source
NVD
EPSS
EPSS 0.34 % · centile 28 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Go
Statut NVD
Modified

Description

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.

Faiblesses (CWE)

  • CWE-1289 — Improper Validation of Unsafe Equivalence in Input
  • CWE-295 — Validation incorrecte de certificat

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCISA-ADP
CVSS 3.1HIGH 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Lredhat-SADP
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:NNVD · nvd@nist.gov (Primary)
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
CVSS 3.1HIGH 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:LNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Avis

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Go standard library · crypto/x509affected 1.26.0-0 < 1.26.2

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD