CVE-2026-59847

Medium

Open

TLP:CLEAR

Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification

NVD CVE.org

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Description

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.

Details

CVSS Score: 5.9
EPSS Score ⓘ: 0.30%

22.9th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Confidence: 90%
Published: Jul 21, 2026
Last Modified: Aug 12, 2026

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