CVE-2026-110926: Openssh: openssh: shared lz77 compression dictionary leaks plaintext across channels

Overview

Severity

Medium (CVSS 5.3)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-21

EPSS Score

0.30% (percentile: 21.6%)

Affected Products (1)

Other

• 21837-17084

Revision History

• 2026-10-21: Information published.