Gnutls: gnutls: security bypass due to incorrect name constraint handling
CVSS score
7.4
EPSS probability
%0.5
Risk score
0.0
Published
5 mo ago
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-42011 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-42011 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | redhat | gnutls | View |
| 2 | Red Hat | Red Hat Enterprise Linux 10 | View |
| 3 | Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | View |
| 4 | Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | View |
| 5 | Red Hat | Red Hat Enterprise Linux 8 | View |
| 6 | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | View |
| 7 | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | View |
| 8 | Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | View |
| 9 | Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | View |
| 10 | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | View |
| 11 | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | View |
| 12 | Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | View |
| 13 | Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | View |
| 14 | Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | View |
| 15 | Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | View |
| 16 | Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | View |
| 17 | Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | View |
| 18 | Red Hat | Red Hat Enterprise Linux 9 | View |
| 19 | Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | View |
| 20 | Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | View |
| 21 | Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | View |
| 22 | Red Hat | Red Hat OpenShift Container Platform 4.12 | View |
| 23 | Red Hat | Red Hat OpenShift Container Platform 4.16 | View |
| 24 | Red Hat | Red Hat OpenShift Container Platform 4.17 | View |
| 25 | Red Hat | Red Hat OpenShift Container Platform 4.18 | View |
| 26 | Red Hat | Red Hat OpenShift Container Platform 4.19 | View |
| 27 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | View |
| 28 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | View |
| 29 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | View |
| 30 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | View |
| 31 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 32 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 33 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 34 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 35 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 36 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | View |
| 37 | Red Hat | Red Hat Discovery 2 | View |
| 38 | Red Hat | Red Hat Discovery 2 | View |
| 39 | Red Hat | Red Hat Hardened Images | View |
| 40 | Red Hat | Red Hat OpenShift AI 3.4 | View |
| 41 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 42 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 43 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 44 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 45 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 46 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 47 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 48 | Red Hat | Red Hat Enterprise Linux 6 | View |
| 49 | Red Hat | Red Hat OpenShift Container Platform 4 | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 7.4 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD |
| 7.4 | CVSS 3.x | — | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U | Microsoft MSRC |
| 7.4 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-42011 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-42011 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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