Name: CVE-2026-59847: Incorrect Check of Function Return Value
Creator: Rapid7
Published: 2026-07-21T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-59847, CWE-253, CWE-1310, CVSS 7.5, EPSS 0.00303

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.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	—	Upgrade libssh-develUpgrade libssh-configUpgrade libssh	Oct 11, 2026	Sep 1, 2026
Alpine Linux	—	Upgrade libssh	Jul 29, 2026	Jul 21, 2026
Amazon_linux_2023	—	Upgrade libssh-debuginfoUpgrade libssh-debugsourceUpgrade libssh-configUpgrade libssh-develUpgrade libssh	Sep 30, 2026	Jul 21, 2026
Debian	—	Upgrade libssh	Aug 3, 2026	Aug 3, 2026
Redhat_linux	—	Upgrade libssh-configUpgrade libssh-develUpgrade libssh-debugsourceUpgrade libsshUpgrade libssh-debuginfo	Jul 23, 2026	Jul 21, 2026
Rocky_linux	—	Upgrade libssh-debuginfoUpgrade libssh-debugsourceUpgrade libsshUpgrade libssh-devel	Aug 20, 2026	Aug 18, 2026
Ubuntu	—	Upgrade libssh-4	Aug 31, 2026	Aug 31, 2026

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CVSS Details

Covered by Rapid7

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