CVE-2026-3833

Discovered by AISLEPUBLISHEDCWE-178

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.

CVSS Base Scores

CVSS v3.1(Primary)

6.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Products

Vendor	Product	Version	Status
Red Hat	GnuTLS	0	affected
Red Hat	GnuTLS	0:3.8.10-4.el10_2	unaffected
Red Hat	GnuTLS	0:3.8.9-9.el10_0.19	—
Red Hat	GnuTLS	0:3.6.16-8.el8_10.6	—
Red Hat	GnuTLS	0:3.6.14-10.el8_4.1	—
Red Hat	GnuTLS	0:4.13-3.el8_4.1	—
Red Hat	GnuTLS	0:3.6.16-5.el8_6.5	—
Red Hat	GnuTLS	0:4.13-3.el8_6.2	—
Red Hat	GnuTLS	0:3.6.16-7.el8_8.4	—
Red Hat	GnuTLS	0:4.13-4.el8_8.1	—
Red Hat	GnuTLS	0:3.8.10-4.el9_8	—
Red Hat	GnuTLS	0:3.8.3-4.el9_4.6	—
Red Hat	GnuTLS	0:3.8.3-6.el9_6.4	—
Red Hat	GnuTLS	1782159791	—
Red Hat	GnuTLS	1782166952	—
Red Hat	GnuTLS	3.8.13-1.hum1	—
Red Hat	GnuTLS	1781525684	—
Red Hat	GnuTLS	1781525671	—
Red Hat	GnuTLS	1781525693	—
Red Hat	GnuTLS	1781525739	—

Description

CVSS Base Scores

Affected Products

References