aces Loris up to 26.0.4/27.0.1 Media path traversal

Summaryinfo

A vulnerability marked as critical has been reported in aces Loris up to 26.0.4/27.0.1. Affected is an unknown function of the component Media Module. Performing a manipulation results in path traversal. This vulnerability is identified as CVE-2026-26984. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in aces Loris up to 26.0.4/27.0.1. This affects an unknown code of the component Media Module. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-26984 since 02/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 26.0.5 or 27.0.2 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• aces

Name

• Loris

Version

• 26.0.0
• 26.0.1
• 26.0.2
• 26.0.3
• 26.0.4
• 27.0.0
• 27.0.1

Website

• Product: https://github.com/aces/Loris/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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