Vulnerability Details CVE-2026-42010
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.3%
CVSS Severity
CVSS v3 Score 7.1
References
- https://access.redhat.com/errata/RHSA-2026:13274
- https://access.redhat.com/errata/RHSA-2026:20611
- https://access.redhat.com/errata/RHSA-2026:20612
- https://access.redhat.com/errata/RHSA-2026:20613
- https://access.redhat.com/security/cve/CVE-2026-42010
- https://bugzilla.redhat.com/show_bug.cgi?id=2467289
Products affected by CVE-2026-42010
-
cpe:2.3:a:gnu:gnutls:-
-
cpe:2.3:a:redhat:hardened_images:-
-
cpe:2.3:a:redhat:openshift_container_platform:4.0
-
cpe:2.3:o:redhat:enterprise_linux:10.0
-
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