What is CVE-2026-106585?

CVE-2026-106585 is a medium-severity vulnerability in OpenBSD OpenSSH, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2026-10-06.

How severe is CVE-2026-106585?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in OpenBSD OpenSSH

CVE-2026-106585

In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded during decompression of highly compressed data.

Published 2026-10-06 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

OpenBSD OpenSSH

Weakness classification (CWE)

CWE-409 — Improper Handling of Highly Compressed Data (Data Amplification)

References

www.openssh.org/releasenotes.html

Frequently asked questions

What is CVE-2026-106585?: CVE-2026-106585 is a medium-severity vulnerability in OpenBSD OpenSSH, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2026-10-06.
How severe is CVE-2026-106585?: Medium severity. CVSS v3 base score is 6.5 out of 10.