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CVE search · CVE-2026-3833

CVE-2026-3833

high 7.4

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.

Open in the NVD CVE.org JSON

Details

Status
Modified
Published
Last changed
Source
secalert@redhat.com
Weakness
CWE-178

Severity

VersionScoreVectorSource
CVSS 3.1 medium 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N secalert@redhat.comSecondary
CVSS 3.1 high 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N nvd@nist.govPrimary

Affected products

Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.

  • gnu · gnutls
  • redhat · hardened_images
  • redhat · openshift_container_platform
  • redhat · enterprise_linux

References