CVE-2026-35446 LORIS has a path traversal in FilesDownloadHandler
An attacker can escape intended download directories in LORIS to read arbitrary files due to incorrect order of operations in the FilesDownloadHandler.
- 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-2026-35446?
CVE-2026-35446 is a high-severity path traversal vulnerability in aces Loris, published on 8 Apr 2026. Any signed-in user can exploit it over the network, 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. From 24.0.0 to before 27.0.3 and 28.0.1, an incorrect order of operations in the FilesDownloadHandler could result in an attacker escaping the intended download directories. This vulnerability is fixed in 27.0.3 and 28.0.1.
Weakness: CWE-552
Which versions are affected by CVE-2026-35446?
It affects 1 product.
Products include Mcgill Loris.
How do I fix CVE-2026-35446?
No fix has been published for CVE-2026-35446 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-2026-35446 being exploited?
There is no known exploitation of CVE-2026-35446 in the wild and no public exploit code.
Other vulnerabilities in aces Loris
- CVE-2026-35169 LORIS has potential cross-site scripting in help_editor module
- CVE-2026-26984 LORIS media module vulnerable to remote code execution
- CVE-2026-26985 LORIS vulnerable to path traversal in electrophysiology_browser
- CVE-2026-33350 LORIS has a SQL injection in MRI feedback popup
- CVE-2026-34392 LORIS has a path traversal in static router
Sources
Also known as GHSA-47jj-7xfg-8759.