CVE-2026-59851
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|
Weaknesses
- CWE-863: Incorrect Authorization
Workarounds
Disable GSSAPIKeyExchange.
References
- https://access.redhat.com/security/cve/CVE-2026-59851
- https://bugzilla.redhat.com/show_bug.cgi?id=2498184
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