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VULNERABILITIES

CVE-2026-42010 Details

Description

A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA: redhat-SADPCVSS-B:7.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:13274 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:20611 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:20612 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:20613 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:26319 redhat-SADP

see all 60 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-170Improper Null Terminationredhat-SADP
CWE-170Improper Null Termination[email protected]
CWE-626Null Byte Interaction Error (Poison Null Byte)CISA-ADP

Affected Products

ProductVersions
gnu gnutls
All versions

CPE

  • cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat hardened images
All versions

CPE

  • cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat openshift container platform
4.0

CPE

  • cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat enterprise linux
6.0
7.0
8.0
9.0
10.0

CPE

  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

54 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-42010
NVD Published Date:
May 7, 2026
NVD Last Modified:
Sep 18, 2026
Source:
[email protected]
CVE-2026-42010 Details - Not Deferred