CVE-2026-42010: Gnutls: gnutls: authentication bypass via nul character in username

Overview

Severity

High (CVSS 7.1)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-15

Last Updated

2026-06-03

EPSS Score

1.05% (percentile: 60.0%)

Affected Products (2)

Open Source Software

• azl3 gnutls 3.8.3-8 on Azure Linux 3.0

Other

• 21391-17084

Revision History

• 2026-05-15: Information published.
• 2026-06-01: Information published.
• 2026-06-03: Information published.