CVEvulnerability

CVE-2026-33810

8.2 HIGH Published 2026-04-08 Modified 2026-09-18 Official page ↗
Status
Modified
Published
2026-04-08
Last modified
2026-09-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L
Weaknesses
CWE-1289, CWE-295

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.

Affected configurations

• golang go (>= 1.26.0 < 1.26.2)

Related

Weakness · CWE (2)

  • CWE-1289 Improper Validation of Unsafe Equivalence in Input weakness
  • CWE-295 Improper Certificate Validation weakness

References