CVE-2026-59851

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.

CVSS Vector

References

• https://access.redhat.com/security/cve/CVE-2026-59851
• https://bugzilla.redhat.com/show_bug.cgi?id=2498184