CVE-2026-26984 LORIS media module vulnerable to remote code execution

High 8.7 Published 25 Feb 2026 Updated 25 Feb 2026

Authenticated users can exploit path traversal to upload malicious files, leading to remote code execution on the LORIS server.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-26984?

CVE-2026-26984 is a high-severity vulnerability in aces Loris, published on 25 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. Prior to versions 26.0.5, 27.0.2, and 28.0.0, an authenticated user with sufficient privileges can exploit a path traversal vulnerability to upload a malicious file to an arbitrary location on the server. Once uploaded, the file can be used to achieve remote code execution (RCE). An attacker must be authenticated and have the appropriate permissions to exploit this issue. If the server is configured as read-only, remote code execution (RCE) is not possible; however, the malicious file upload may still be achievable. This problem is fixed in LORIS v26.0.5 and above, v27.0.2 and above, and v28.0.0 and above. As a workaround, LORIS administrators can disable the media module if it is not being used.

Weakness: CWE-434, CWE-22

Which versions are affected by CVE-2026-26984?

It affects 1 product.

Products include Mcgill Loris.

How do I fix CVE-2026-26984?

No fix has been published for CVE-2026-26984 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-26984 being exploited?

There is no known exploitation of CVE-2026-26984 in the wild and no public exploit code.

Sources

Also known as GHSA-mpgc-c48m-6v2h.