CVE-2026-59850: Libssh: libssh: use-after-free via data callbacks on closed channels

Overview

Severity

Medium (CVSS 4.3)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-25

Last Updated

2026-08-11

EPSS Score

0.35% (percentile: 27.7%)

Affected Products (2)

Other

• 21700-17084
• 21431-17084

Revision History

• 2026-07-25: Information published.
• 2026-08-07: Information published.
• 2026-08-11: Information published.