High severity8.8NVD Advisory· Published Jul 21, 2026· Updated Aug 17, 2026
CVE-2026-59851
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
14- cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
- osv-coords9 versionspkg:apk/chainguard/libsshpkg:apk/chainguard/libssh-devpkg:apk/chainguard/libssh2pkg:apk/wolfi/libsshpkg:apk/wolfi/libssh-devpkg:apk/wolfi/libssh2pkg:rpm/almalinux/libsshpkg:rpm/almalinux/libssh-configpkg:rpm/almalinux/libssh-devel
< 0.12.1-r0+ 8 more
- (no CPE)range: < 0.12.1-r0
- (no CPE)range: < 0.12.1-r0
- (no CPE)range: < 0
- (no CPE)range: < 0.12.1-r0
- (no CPE)range: < 0.12.1-r0
- (no CPE)range: < 0
- (no CPE)range: < 0.12.0-3.el10_2
- (no CPE)range: < 0.12.0-3.el10_2
- (no CPE)range: < 0.12.0-3.el10_2
Patches
Vulnerability mechanics
References
4- access.redhat.com/security/cve/CVE-2026-59851nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:42922nvdIssue Tracking
- access.redhat.com/errata/RHSA-2026:55855nvd
News mentions
1- Libssh: Eleven Vulnerabilities Disclosed Together, Including Auth Bypass and DoSVypr Intelligence · Jul 21, 2026