CVE-2026-42010 — HIGH (7.1)

Vulnerability 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.

CVSS Score

7.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Gnu	Gnutls	-
Redhat	Hardened Images	-
Redhat	Openshift Container Platform	4.0
Redhat	Enterprise Linux	6.0

Related Weaknesses (CWE)

CWE-626

References

https://access.redhat.com/errata/RHSA-2026:13274
https://access.redhat.com/security/cve/CVE-2026-42010Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2467289Issue TrackingVendor Advisory

FAQ

What is CVE-2026-42010?

CVE-2026-42010 is a vulnerability with a CVSS score of 7.1 (HIGH). 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...

How severe is CVE-2026-42010?

CVE-2026-42010 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42010?

Check the references section above for vendor advisories and patch information. Affected products include: Gnu Gnutls, Redhat Hardened Images, Redhat Openshift Container Platform, Redhat Enterprise Linux.