CVE-2026-59849

HighCVSS 7.5/10Last modified Nov 6, 2026

Description

A flaw was found in libssh. Logic errors in automatic certificate-based public key authentication can cause libssh clients to loop indefinitely when configured certificates are missing or repeatedly rejected by a server, leading to denial of service.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-835

Affected software

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10	—
Red Hat	Red Hat Hardened Images	—
Red Hat	Red Hat Enterprise Linux 8	—
Red Hat	Red Hat Enterprise Linux 9	—

References

https://access.redhat.com/errata/RHSA-2026:42922Issue Tracking
https://access.redhat.com/errata/RHSA-2026:55855Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-59849Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2498182Issue Tracking, Vendor Advisory

Timeline

Published: Jul 21, 2026
Last modified: Nov 6, 2026
NVD status: Analyzed

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