This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-59851 →

DEBIAN-CVE-2026-59851

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos princi...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:14 libssh

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.12.1-1"}]}]

References

advisory security-tracker.debian.org