NIXPKGS-2026-1338
GitHub issue
published on
Permalink
CVE-2026-3833
6.5 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): NETWORK
- Attack complexity (AC): LOW
- Privileges required (PR): NONE
- User interaction (UI): NONE
- Scope (S): UNCHANGED
- Confidentiality impact (C): LOW
- Integrity impact (I): LOW
- Availability impact (A): NONE
by @LeSuisse Activity log
- Created suggestion
-
@LeSuisse
ignored
4 packages
- guile-gnutls
- python312Packages.python3-gnutls
- python313Packages.python3-gnutls
- python314Packages.python3-gnutls
- @LeSuisse ignored maintainer @vcunat maintainer.ignore
-
@LeSuisse
ignored
2 references
- @LeSuisse accepted
- @LeSuisse published on GitHub
Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison
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
Ignored references (2)
Affected products
rhcos
gnutls
Matching in nixpkgs
Ignored packages (4)
pkgs.guile-gnutls
Guile bindings for GnuTLS library
pkgs.python312Packages.python3-gnutls
Python wrapper for the GnuTLS library
-
nixos-25.11 python3-gnutls-3.1.10
- nixos-25.11-small python3-gnutls-3.1.10
- nixpkgs-25.11-darwin python3-gnutls-3.1.10
pkgs.python313Packages.python3-gnutls
Python wrapper for the GnuTLS library
-
nixos-unstable python3-gnutls-3.1.10
- nixpkgs-unstable python3-gnutls-3.1.10
- nixos-unstable-small python3-gnutls-3.1.10
-
nixos-25.11 python3-gnutls-3.1.10
- nixos-25.11-small python3-gnutls-3.1.10
- nixpkgs-25.11-darwin python3-gnutls-3.1.10
pkgs.python314Packages.python3-gnutls
Python wrapper for the GnuTLS library
-
nixos-unstable python3-gnutls-3.1.10
- nixpkgs-unstable python3-gnutls-3.1.10
- nixos-unstable-small python3-gnutls-3.1.10
Package maintainers
Ignored maintainers (1)
-
@vcunat Vladimír Čunát <v@cunat.cz>