CVE-2026-59851
High · 8.8CVSS
8.8
EPSS
0.5%
Published
Jul 21, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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