CVE-2026-110926

openssh: openssh: shared LZ77 compression dictionary leaks plaintext across channels

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Severity

Moderate

Red Hat Product Security

5.3

CVSS 3.1

Review impact separately from score.

Published · October 15, 2026

Updated · November 4, 2026

Description

A flaw was found in OpenSSH. When compression is negotiated, channels on the same connection share one LZ77 dictionary. A peer who can write on one channel can recover plaintext from another channel by chosen-plaintext lengths.

Statement

Status: REJECTED

Reason: Duplicate

CVE-2026-110926 has been marked as a duplicate of CVE-2026-106582.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE-203 · Observable Discrepancy