Vulnerability in Aces Loris
CVE-2026-35400
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, an endpoint in the publication module was incorrectly trusting the baseURL submitted by a user's POST request rather than the internal LORIS value. This could result in a theoretical attacker with publication module access forging an email to an external domain under the attacker's control which appeared to come from LORIS. This vulnerability is fixed in 27.0.3 and 28.0.1.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.0% 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: 0.003 · change: +0.001
Affected products
- Aces Loris — versions >= 20.0.0, < 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-6prw-34x8-3gpg (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-35400?
- CVE-2026-35400 is a low-severity vulnerability in Aces Loris, classified under Improper Link Resolution Before File Access. CVSS score: 3.5/10. Published 2026-04-08.
- How severe is CVE-2026-35400?
- Low severity. CVSS v3 base score is 3.5 out of 10.