What is CVE-2026-59995?

CVE-2026-59995 is a medium-severity vulnerability in OpenBSD OpenSSH, classified under Relative Path Traversal. CVSS score: 4.2/10. Published 2026-07-08.

How severe is CVE-2026-59995?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Path Traversal in OpenBSD OpenSSH

CVE-2026-59995

sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.

Published 2026-07-08 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (15.0th percentile), scored 2026-10-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

OpenBSD OpenSSH — versions 0

Weakness classification (CWE)

CWE-23 — Relative Path Traversal

References

www.openwall.com/lists/oss-security/2026/07/06/5 (Mailing List, Release Notes)
marc.info/ (Release Notes)
www.openssh.org/releasenotes.html (Release Notes)

Frequently asked questions

What is CVE-2026-59995?: CVE-2026-59995 is a medium-severity vulnerability in OpenBSD OpenSSH, classified under Relative Path Traversal. CVSS score: 4.2/10. Published 2026-07-08.
How severe is CVE-2026-59995?: Medium severity. CVSS v3 base score is 4.2 out of 10.