Vulnerability in Aces Loris
CVE-2026-35446
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Aces Loris — versions >= 24.0.0, < 27.0.3, >= 28.0.0, < 28.0.1
- Mcgill Loris — versions 28.0.0
Weakness classification (CWE)
References
- github.com/aces/Loris/security/advisories/GHSA-47jj-7xfg-8759 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-35446?
- CVE-2026-35446 is a high-severity vulnerability in Aces Loris, classified under Files or Directories Accessible to External Parties. CVSS score: 7.7/10. Published 2026-04-08.
- How severe is CVE-2026-35446?
- High severity. CVSS v3 base score is 7.7 out of 10.