CVE-2026-26984
LORIS media module vulnerable to remote code execution
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.
INFO
Published Date :
Feb. 25, 2026, 10:16 p.m.
Last Modified :
March 5, 2026, 5:41 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | HIGH | [email protected] | ||||
| CVSS 3.0 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update LORIS to version 26.0.5, 27.0.2, or 28.0.0.
- Disable the media module if it is not in use.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-26984.
| URL | Resource |
|---|---|
| https://github.com/aces/Loris/releases/tag/v26.0.5 | Product Release Notes |
| https://github.com/aces/Loris/releases/tag/v27.0.2 | Product Release Notes |
| https://github.com/aces/Loris/security/advisories/GHSA-mpgc-c48m-6v2h | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-26984 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-26984
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-26984 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-26984 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 05, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-22 Added CPE Configuration OR *cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:* versions up to (excluding) 26.0.5 *cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:* versions from (including) 27.0.0 up to (excluding) 27.0.2 Added Reference Type GitHub, Inc.: https://github.com/aces/Loris/releases/tag/v26.0.5 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/aces/Loris/releases/tag/v27.0.2 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/aces/Loris/security/advisories/GHSA-mpgc-c48m-6v2h Types: Vendor Advisory -
New CVE Received by [email protected]
Feb. 25, 2026
Action Type Old Value New Value Added 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. Added CVSS V3 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N Added CWE CWE-22 Added CWE CWE-434 Added Reference https://github.com/aces/Loris/releases/tag/v26.0.5 Added Reference https://github.com/aces/Loris/releases/tag/v27.0.2 Added Reference https://github.com/aces/Loris/security/advisories/GHSA-mpgc-c48m-6v2h