CVE-2026-109156 SeldonIO MLServer environment_tarball env.py _extract_env path traversal
Remote attackers can exploit a path traversal vulnerability in SeldonIO MLServer to read or modify arbitrary files on the server.
- 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
- None listed
What is CVE-2026-109156?
CVE-2026-109156 is a medium-severity path traversal vulnerability in SeldonIO MLServer, published on 13 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
A vulnerability has been found in SeldonIO MLServer up to 1.6.1. Affected is the function _extract_env of the file mlserver/env.py of the component environment_tarball Handler. Such manipulation leads to path traversal. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-22
Which versions are affected by CVE-2026-109156?
How do I fix CVE-2026-109156?
No fix has been published for CVE-2026-109156 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-109156 being exploited?
There is no known exploitation of CVE-2026-109156 in the wild and no public exploit code.
Sources
Also known as GHSA-46h3-793q-hvxm.