CVE-2026-90445 Path Traversal in Malcolm
Authenticated attackers can exploit path traversal in file uploads to write arbitrary files, potentially modifying data or executing code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90445?
CVE-2026-90445 is a high-severity path traversal vulnerability in CISA Malcolm, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An interface that accepts file uploads from authenticated users extracts the contents of uploaded archives without validating that extracted file paths remain within the intended destination directory. This allows an authenticated attacker to craft an archive whose entries traverse outside the destination directory, causing the extraction process to write files to arbitrary locations with the privileges of that process. This could allow an attacker to inject fabricated records into the system's stored data or tamper with application configuration.
Weakness: CWE-22
Which versions are affected by CVE-2026-90445?
How do I fix CVE-2026-90445?
No fix has been published for CVE-2026-90445 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-2026-90445 being exploited?
There is no known exploitation of CVE-2026-90445 in the wild and no public exploit code.
Sources
Also known as GHSA-323p-5qr7-q36j.