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.

Score
CVSS 3.1 9.8 Critical
Status
Modified - secalert@redhat.com
Published
2026-05-07
Last modified
2026-10-26
Weaknesses
CWE-170, CWE-626

Affected products

References

 
 
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