CVE-2026-34985

LORIS has incorrect access checks in media module

State: Published
Severity: 6.3 Medium
Published: Apr 8, 2026
Updated: Apr 10, 2026
Reserved: Mar 31, 2026

Description

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 16.1.0 to before 27.0.3 and 28.0.1, While the frontend of the media module filters files that the user should not have access to, the backend was not applying access checks and it would be possible for someone who should not have access to a file to access it if they know the filename. This vulnerability is fixed in 27.0.3 and 28.0.1.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	GitHub_M

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
Lorisaces	>= 16.1.0, < 27.0.3Affected >= 28.0.0, < 28.0.1Affected

References

https://github.com/aces/Loris/security/advisories/GHSA-p42c-4gmq-hrjw

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