What is GHSA-x5cr-v39m-53gw?

GHSA-x5cr-v39m-53gw is a security advisory published by GitHub Security Advisories with High severity. A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does...

Which CVE IDs does GHSA-x5cr-v39m-53gw cover?

GHSA-x5cr-v39m-53gw covers the following CVE IDs: CVE-2026-59851. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-x5cr-v39m-53gw?

GHSA-x5cr-v39m-53gw has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

GHSA-x5cr-v39m-53gwHighCVSS 8.8

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does...

Vendor

GitHub Security Advisories

Published

July 21, 2026

Last Modified

July 21, 2026

🔗 CVE IDs covered (1)

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.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-59851
https://access.redhat.com/security/cve/CVE-2026-59851
https://bugzilla.redhat.com/show_bug.cgi?id=2498184
https://github.com/advisories/GHSA-x5cr-v39m-53gw