CVE-2026-106552 Path traversal in OpenSSH

Medium 4.2 Published 6 Oct 2026 Updated 7 Oct 2026

A malicious SFTP server can trigger directory traversal during recursive copy operations, causing files to be written to unintended locations on the client.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-106552?

CVE-2026-106552 is a medium-severity path traversal vulnerability in OpenSSH, published on 6 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In sftp in OpenSSH before 10.6, a server can trigger directory traversal (causing files to be written to unintended locations) during a recursive copy operation.

Weakness: CWE-23

Which versions are affected by CVE-2026-106552?

It affects 1 product.

Products include OpenSSH.

How do I fix CVE-2026-106552?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-106552 being exploited?

There is no known exploitation of CVE-2026-106552 in the wild and no public exploit code.

All OpenSSH vulnerabilities

Sources

Also known as AZL-106700, BELL-CVE-2026-106552, CVE-2026-110923, DEBIAN-CVE-2026-106552, ECHO-8810-2205-be78, GHSA-695p-3q57-gff4 and 1 more.