NetSight
IP …
medium6.5

CVE-2026-3833

A flaw was found in gnutls.

Impact

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.

Affected products

VendorProductAffected versions
GnuGnutls
All versions
RedhatHardened Images
All versions
RedhatOpenshift Container Platform
Version 4.0
RedhatEnterprise Linux
Versions 6.0, 7.0, 8.0, 9.0, 10.0

Weakness classification

CWE-178

References