Vulnerability 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 versions 26.0.5, 27.0.2, and 28.0.0, an authenticated user with sufficient privileges can exploit a path traversal vulnerability to upload a malicious file to an arbitrary location on the server. Once uploaded, the file can be used to achieve remote code execution (RCE). An attacker must be authenticated and have the appropriate permissions to exploit this issue. If the server is configured as read-only, remote code execution (RCE) is not possible; however, the malicious file upload may still be achievable. This problem is fixed in LORIS v26.0.5 and above, v27.0.2 and above, and v28.0.0 and above. As a workaround, LORIS administrators can disable the media module if it is not being used.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mcgill | Loris | < 26.0.5 |
Related Weaknesses (CWE)
References
- https://github.com/aces/Loris/releases/tag/v26.0.5ProductRelease Notes
- https://github.com/aces/Loris/releases/tag/v27.0.2ProductRelease Notes
- https://github.com/aces/Loris/security/advisories/GHSA-mpgc-c48m-6v2hVendor Advisory
FAQ
What is CVE-2026-26984?
CVE-2026-26984 is a vulnerability with a CVSS score of 8.8 (HIGH). LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. Prior to versions 26.0.5, 27.0.2, and 28....
How severe is CVE-2026-26984?
CVE-2026-26984 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-26984?
Check the references section above for vendor advisories and patch information. Affected products include: Mcgill Loris.