What’s Vulnerable › Vulnerabilities

CVE-2026-39985: LORIS has an open redirect field on login

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-09 · updated 2026-10-26
• Weakness: CWE-601

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.

Affected products

• aces Loris: before 27.0.3; 28.0.0 — fixed in 27.0.3

How to fix

Upgrade to a fixed version: aces Loris 27.0.3. Check the vendor advisory for mitigations.

References

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

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