CVE-2026-59849

Low

Open

TLP:CLEAR

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

NVD CVE.org

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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.

Details

CVSS Score: 3.1
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Confidence: 90%
Published: Jul 21, 2026
Last Modified: Aug 19, 2026

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