CVE-2026-35165 Details
Description
LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 21.0.0 to before 27.0.3 and 28.0.1, while the document_repository frontend was restricting file access, the backend endpoint was not correctly verifying access permissions. A user could theoretically download a file that they should not have access to, if they know or can brute force the filename. This vulnerability is fixed in 27.0.3 and 28.0.1.
An access control vulnerability has been identified in the LORIS (Longitudinal Online Research and Imaging System) document repository module, affecting versions 21.0.0 prior to 27.0.3 and 28.0.1. While the frontend was properly restricting file access, the backend endpoint failed to verify permissions correctly. This flaw allowed users to potentially download files they should not have access to, provided they knew or could guess the filename.
Users can update to LORIS version 27.0.2 or 28.0.1 to address this vulnerability. Alternatively, LORIS projects that are no longer using the document repository can disable the module to remove access to the vulnerable endpoint.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/aces/Loris/security/advisories/GHSA-qp6x-qfx7-54wp | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mcgill loris | >= 21.0.0, <= 27.0.2 28.0.0 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 21, 2026 | Initial Analysis | [email protected] |
| Apr 8, 2026 | New CVE Received | [email protected] |