CVE-2026-59848

Medium

Open

TLP:CLEAR

Libssh: libssh: denial of service via sftp responses with unknown request ids

NVD CVE.org

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Description

A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service.

Details

CVSS Score: 5.3
EPSS Score ⓘ: 0.30%

21.9th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Confidence: 90%
Published: Jul 21, 2026
Last Modified: Aug 12, 2026

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