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.

INFO

Published Date :

2026-04-30T17:37:05.818Z

Last Modified :

2026-04-30T18:37:57.245Z

Source :

redhat
AFFECTED PRODUCTS

The following products are affected by CVE-2026-3833 vulnerability.

Vendors Products
Redhat
  • Enterprise Linux
  • Hummingbird
  • Openshift
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-3833.

URL Resource
https://access.redhat.com/security/cve/CVE-2026-3833 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2445763 cve-icon cve-icon
https://gitlab.com/gnutls/gnutls/-/issues/1803 cve-icon cve-icon cve-icon
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CVSS Vulnerability Scoring System

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