CVE-2026-34392 LORIS has a path traversal in static router
An attacker can traverse directories to download unintended files via static endpoints in the LORIS neuroimaging web application.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34392?
CVE-2026-34392 is a high-severity path traversal vulnerability in aces Loris, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, 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 20.0.0 to before 27.0.3 and 28.0.1, a bug in the static file router can allow an attacker to traverse outside of the intended directory, allowing unintended files to be downloaded through the static, css, and js endpoints. This vulnerability is fixed in 27.0.3 and 28.0.1.
Weakness: CWE-552
Which versions are affected by CVE-2026-34392?
It affects 1 product.
Products include Mcgill Loris.
How do I fix CVE-2026-34392?
No fix has been published for CVE-2026-34392 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-2026-34392 being exploited?
There is no known exploitation of CVE-2026-34392 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-2026-35446 LORIS has a path traversal in FilesDownloadHandler
- CVE-2026-33350 LORIS has a SQL injection in MRI feedback popup
Sources
Also known as GHSA-rfj5-58hv-wc5f.