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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- EPSS probability
- 1.05%
- CWE
- CWE-170
- Published
- 2026-05-07
- Last modified
- 2026-09-04
Affected products
- Red Hat Red Hat Hardened Images
- Red Hat Red Hat Enterprise Linux 8
- Red Hat Red Hat Enterprise Linux 10
- Red Hat Red Hat Enterprise Linux 9
- Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Red Hat Update Infrastructure 5
- Red Hat Red Hat Update Infrastructure 5
- Red Hat Red Hat Update Infrastructure 5
Weakness type
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