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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
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.
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[{"defaultStatus":"unaffected","collectionURL":"https://gitlab.com/gnutls/gnutls","packageName":"gnutls","versions":[{"version":"0","lessThan":"3.8.13","versionType":"semver","status":"affected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"versions":[{"version":"0:3.8.10-4.el10_2","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"versions":[{"version":"0:3.8.9-9.el10_0.19","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream","cpe:/o:redhat:enterprise_linux:8::baseos"],"versions":[{"version":"0:3.6.16-8.el8_10.6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream","cpe:/o:redhat:enterprise_linux:8::baseos"],"versions":[{"version":"0:3.6.16-8.el8_10.6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/o:redhat:enterprise_linux:9::baseos"],"versions":[{"version":"0:3.8.10-4.el9_8","lessThan":"*","versionType":"
[{"defaultStatus":"unaffected","collectionURL":"https://gitlab.com/gnutls/gnutls","packageName":"gnutls","versions":[{"version":"0","lessThan":"3.8.13","versionType":"semver","status":"affected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"versions":[{"version":"0:3.8.10-4.el10_2","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream","cpe:/o:redhat:enterprise_linux:8::baseos"],"versions":[{"version":"0:3.6.16-8.el8_10.6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream","cpe:/o:redhat:enterprise_linux:8::baseos"],"versions":[{"version":"0:3.6.16-8.el8_10.6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/o:redhat:enterprise_linux:9::baseos"],"versions":[{"version":"0:3.8.10-4.el9_8","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gnutls","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/o:redhat:enterprise_linux:9::baseos"],"versions":[{"version":"0:3.8.10-4.el9_8","lessThan":"*
CVE Modified by Red Hat, Inc.6/02/2026 12:16:38 PM
Action
Type
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Reference
https://access.redhat.com/errata/RHSA-2026:20612
CVE Modified by Red Hat, Inc.6/01/2026 5:16:43 PM
Action
Type
Old Value
New Value
Added
Reference
https://access.redhat.com/errata/RHSA-2026:20613
CVE Modified by Red Hat, Inc.5/27/2026 12:16:30 AM
Action
Type
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Reference
https://access.redhat.com/errata/RHSA-2026:20611
Initial Analysis by NIST5/06/2026 10:09:04 PM
Action
Type
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CVSS V3.1
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Added
CPE Configuration
OR
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
*cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:13274 Types: Issue Tracking, Third Party Advisory
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3833 Types: Third Party Advisory
Added
Reference Type
Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2445763 Types: Issue Tracking, Third Party Advisory
Added
Reference Type
Red Hat, Inc.: https://gitlab.com/gnutls/gnutls/-/issues/1803 Types: Exploit, Issue Tracking, Vendor Advisory
CVE Modified by Red Hat, Inc.5/03/2026 4:16:02 PM
Action
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Reference
https://access.redhat.com/errata/RHSA-2026:13274
CVE Modified by CISA-ADP4/30/2026 3:16:09 PM
Action
Type
Old Value
New Value
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Reference
https://gitlab.com/gnutls/gnutls/-/issues/1803
New CVE Received from Red Hat, Inc.4/30/2026 2:16:30 PM
Action
Type
Old Value
New Value
Added
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.
) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
