What is CVE-2026-35403?

CVE-2026-35403 is a medium-severity vulnerability in Aces Loris, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-04-08.

How severe is CVE-2026-35403?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in Aces Loris

CVE-2026-35403

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 15.10 to before 27.0.3 and 28.0.1, there is a potential for a cross-site sc…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (2.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N.

Affected products

Aces Loris — versions >= 15.10, < 27.0.3, >= 28.0.0, < 28.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-35403?: CVE-2026-35403 is a medium-severity vulnerability in Aces Loris, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-04-08.
How severe is CVE-2026-35403?: Medium severity. CVSS v3 base score is 6.5 out of 10.