Disclosure summary
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.
Source-reported weakness categories
CWE-178
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-3833
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| gnu | gnutls | - |
| redhat | hardened_images | - |
| redhat | openshift_container_platform | 4.0 |
| redhat | enterprise_linux | 6.0 |
| redhat | enterprise_linux | 7.0 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
| redhat | enterprise_linux | 10.0 |
Original records & references
- NIST NVD record
- CVE Program record
- access.redhat.com — Issue Tracking, Third Party Advisory
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com — Third Party Advisory
- bugzilla.redhat.com — Issue Tracking, Third Party Advisory
- gitlab.com — Exploit, Issue Tracking, Vendor Advisory
- gitlab.com — Exploit, Issue Tracking, Vendor Advisory
PUBLISHED 2026-04-30T14:16:30-04:00
MODIFIED 2026-10-08T20:17:08-04:00
INGESTED 2026-10-10T20:50:35-04:00