Vulnerability in Gnu Gnutls
CVE-2026-3833
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 `permit…
EPSS: 0.001 (31.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Gnu Gnutls
- Red Hat Enterprise Linux 10 — versions 0:3.8.10-4.el10_2
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:3.6.16-8.el8_10.6
- Red Hat Enterprise Linux 9 — versions 0:3.8.10-4.el9_8
- Red Hat Hardened Images — versions 3.8.13-1.hum1
- Red Hat Openshift Container Platform 4
- Redhat Enterprise_linux — versions 6.0, 7.0, 8.0
- Redhat Hardened_images
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Exploit, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-3833?
- CVE-2026-3833 is a medium-severity vulnerability in Gnu Gnutls, classified under Improper Handling of Case Sensitivity. CVSS score: 6.5/10. Published 2026-04-30.
- How severe is CVE-2026-3833?
- Medium severity. CVSS v3 base score is 6.5 out of 10.