Public vulnerability disclosure
CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constraint handling
publishedCWE-295
A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.
Technical severity7.4 highCVSS 3.1 · CNA: redhat
Published2026-05-07Source updated 2026-11-11
Collected2026-11-113 attributed sources
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
gnutls
https://gitlab.com/gnutls/gnutls |
0 (affected) | CNA: redhat |
| Red Hat Enterprise Linux 10 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.10-4.el10_2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.9-9.el10_0.19; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.3.29-9.el7_9.2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.6.16-8.el8_10.6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.6.14-10.el8_4.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat libtasn1
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:4.13-3.el8_4.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.6.14-10.el8_4.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat libtasn1
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:4.13-3.el8_4.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.6.16-5.el8_6.5; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat libtasn1
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:4.13-3.el8_6.2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.6.16-5.el8_6.5; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat libtasn1
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:4.13-3.el8_6.2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.6.16-7.el8_8.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat libtasn1
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:4.13-4.el8_8.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.6.16-7.el8_8.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat libtasn1
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:4.13-4.el8_8.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.10-4.el9_8; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.7.6-21.el9_2.7; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.3-4.el9_4.6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.3-6.el9_6.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.12 Red Hat openshift/ose-rhel-coreos-8
https://access.redhat.com/downloads/content/package-browser/ |
≥ 412.86.202608241157-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.13 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 413.92.202611041925-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.14 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 414.92.202611040941-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.16 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 416.94.202608150307-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.17 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 417.94.202608250221-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.18 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 418.94.202608142238-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.19 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 4.19.9.6.202607151909-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.20 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 4.20.9.6.202610242033-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.21 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 4.21.9.6.202610241345-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4.22 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
≥ 4.22.9.8.202610241758-0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/jetstack-cert-manager-acmesolver-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791371080; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791371069; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791788287; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/cert-manager-operator-bundle
https://catalog.redhat.com/software/containers/ |
≥ 1791970484; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/jetstack-cert-manager-acmesolver-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791459707; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791459711; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/cert-manager-istio-csr-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791459759; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1789029076; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/cert-manager-operator-bundle
https://catalog.redhat.com/software/containers/ |
≥ 1791966259; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.20 Red Hat cert-manager/cert-manager-trust-manager-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1790598593; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Discovery 2 Red Hat discovery/discovery-server-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1782159791; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Discovery 2 Red Hat discovery/discovery-ui-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1782166952; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Hardened Images Red Hat gnutls-main
https://catalog.redhat.com/software/containers/ |
≥ 3.8.13-1.hum1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift AI 3.4 Red Hat rhai/base-image-neuron-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1790703542; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/cds-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525684; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/haproxy-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525671; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/installer-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525693; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/rhua-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525739; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/cds-kubernetes-tp-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1787241211; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/installer-tp-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1787135742; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/rhua-tp-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1787241260; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4 Red Hat openshift4/ose-hypershift-rhel9
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat OpenShift Container Platform 5 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.4 high |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CNA: redhat |
| 3.1 / 7.4 high |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/errata/RHSA-2026:13274CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:20611CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:20612CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:20613CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26319CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26409CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29197CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:30004CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:30849CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:30850CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:32962CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33125CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:40762CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:41921CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:43575CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:56853CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:57483CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:58981CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:59831CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:60019CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:72502CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:74674CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82304CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82322CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82347CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82354CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82372CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82857CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82888CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:89197CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:89232CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:89333CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:95508CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:95745CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-42011CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2467437CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-6CNA: redhat
- https://access.redhat.com/errata/RHSA-2026:13274[email protected]
- https://access.redhat.com/errata/RHSA-2026:20611[email protected]
- https://access.redhat.com/errata/RHSA-2026:20612[email protected]
- https://access.redhat.com/errata/RHSA-2026:20613[email protected]
- https://access.redhat.com/errata/RHSA-2026:26319[email protected]
- https://access.redhat.com/errata/RHSA-2026:26409[email protected]
- https://access.redhat.com/errata/RHSA-2026:29197[email protected]
- https://access.redhat.com/errata/RHSA-2026:30004[email protected]
- https://access.redhat.com/errata/RHSA-2026:30849[email protected]
- https://access.redhat.com/errata/RHSA-2026:30850[email protected]
- https://access.redhat.com/errata/RHSA-2026:32962[email protected]
- https://access.redhat.com/errata/RHSA-2026:33125[email protected]
- https://access.redhat.com/errata/RHSA-2026:40762[email protected]
- https://access.redhat.com/errata/RHSA-2026:41921[email protected]
- https://access.redhat.com/errata/RHSA-2026:43575[email protected]
- https://access.redhat.com/errata/RHSA-2026:56853[email protected]
- https://access.redhat.com/errata/RHSA-2026:57483[email protected]
- https://access.redhat.com/errata/RHSA-2026:58981[email protected]
- https://access.redhat.com/errata/RHSA-2026:59831[email protected]
- https://access.redhat.com/errata/RHSA-2026:60019[email protected]
- https://access.redhat.com/errata/RHSA-2026:72502[email protected]
- https://access.redhat.com/errata/RHSA-2026:74674[email protected]
- https://access.redhat.com/errata/RHSA-2026:82304[email protected]
- https://access.redhat.com/errata/RHSA-2026:82322[email protected]
- https://access.redhat.com/errata/RHSA-2026:82347[email protected]
- https://access.redhat.com/errata/RHSA-2026:82354[email protected]
- https://access.redhat.com/errata/RHSA-2026:82372[email protected]
- https://access.redhat.com/errata/RHSA-2026:82857[email protected]
- https://access.redhat.com/errata/RHSA-2026:82888[email protected]
- https://access.redhat.com/errata/RHSA-2026:89197[email protected]
- https://access.redhat.com/errata/RHSA-2026:89232[email protected]
- https://access.redhat.com/errata/RHSA-2026:89333[email protected]
- https://access.redhat.com/errata/RHSA-2026:95508[email protected]
- https://access.redhat.com/security/cve/CVE-2026-42011[email protected]
- https://bugzilla.redhat.com/show_bug.cgi?id=2467437[email protected]
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-6[email protected]
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