CVE-2026-39985

Name: CVE-2026-39985
Creator: NVD / NIST
Published: 2026-04-09T18:17:02.653+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2026-39985 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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 validating the value of the redirect as being within LORIS, which could be used to trick users into visiting arbitrary URLs if they are given a link with a third party redirect parameter. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

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 validating the value of the redirect as being within LORIS, which could be used to trick users into visiting arbitrary URLs if they are given a link with a third party redirect parameter. This vulnerability is fixed in 27.0.3 and 28.0.1.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.20%

10.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Mcgill	Loris	< 27.0.3
Mcgill	Loris	28.0.0

References

https://github.com/aces/Loris/commit/f57f54b42a076bf53ba86e20d4dbf37f63538f58Patch
https://github.com/aces/Loris/releases/tag/v27.0.3Release Notes
https://github.com/aces/Loris/releases/tag/v28.0.1Release Notes
https://github.com/aces/Loris/security/advisories/GHSA-rch2-f5fw-cg95Vendor Advisory

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-39985?

How severe is CVE-2026-39985?

CVE-2026-39985 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-39985?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-39985?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST