What is CVE-2026-39985?

CVE-2026-39985 is a medium-severity vulnerability in Aces Loris, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-04-09.

How severe is CVE-2026-39985?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Open Redirect in Aces Loris

CVE-2026-39985

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. Prior to 27.0.3 and 28.0.1, the redirect parameter upon login to LORIS was not v…

Vulnerability class: Open Redirect

EPSS: 0.000 (11.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Affected products

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

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

https://github.com/aces/Loris/security/advisories/GHSA-rch2-f5fw-cg95 (x_refsource_CONFIRM)
https://github.com/aces/Loris/commit/f57f54b42a076bf53ba86e20d4dbf37f63538f58 (x_refsource_MISC)
https://github.com/aces/Loris/releases/tag/v27.0.3 (x_refsource_MISC)
https://github.com/aces/Loris/releases/tag/v28.0.1 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-39985?: CVE-2026-39985 is a medium-severity vulnerability in Aces Loris, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-04-09.
How severe is CVE-2026-39985?: Medium severity. CVSS v3 base score is 4.3 out of 10.