GHSA-6rgh-57xm-37v8MediumCVSS 6.5
A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive...
🔗 CVE IDs covered (1)
📋 Description
A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of nameConstraints labels, specifically for dNSName (DNS) or rfc822Name (email) constraints within excludedSubtrees or permittedSubtrees. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-3833
- https://access.redhat.com/security/cve/CVE-2026-3833
- https://bugzilla.redhat.com/show_bug.cgi?id=2445763
- https://gitlab.com/gnutls/gnutls/-/issues/1803
- https://access.redhat.com/errata/RHSA-2026:13274
- https://access.redhat.com/errata/RHSA-2026:20611
- https://github.com/advisories/GHSA-6rgh-57xm-37v8