VULNERABILITY INTELLIGENCE

CVE-2026-59851

CVSS score8.8 HIGH
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-07-21
Last modified2026-08-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users.

Weakness classification

  • secalert@redhat.com: CWE-863

Primary references