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CVE-2026-59849

Libssh: libssh: denial of service via automatic certificate authentication loop

Published: 7/21/2026 Last updated: 8/19/2026 Reserved: 7/7/2026

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 3.1 Low CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Opam packages affected (1)

libssh

Products affected (0)

No product listed.

References (4)

Credits (1)