CVE-2026-42010

Discovered by AISLEPUBLISHED

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 Base Scores

CVSS v3.1(Primary)
7.1

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

Affected Products

VendorProductVersionStatus
Red HatGnuTLS0:3.6.16-8.el8_10.6unaffected
Red HatGnuTLS3.8.13-1.hum1—

Credits

  • Red Hat would like to thank Joshua Rogers (AISLE Research Team) for reporting this issue.

References