High 8.8Published Jul 21, 2026

CVE-2026-59851A flaw was found in libssh.

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects libssh and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for libssh

Exploited in the last 30 days

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: 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

libssh libssh libssh:libssh	all versions	NVD
redhat hardened_images redhat:hardened_images	all versions	NVD
redhat enterprise_linux redhat:enterprise_linux	10.0	NVD

References

https://access.redhat.com/errata/RHSA-2026:42922issue-tracking
https://access.redhat.com/errata/RHSA-2026:55855
https://access.redhat.com/security/cve/CVE-2026-59851vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2498184issue-tracking, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.