CVE-2026-35403
LORIS has potential cross-site scripting in survey_accounts module
Description
LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 15.10 to before 27.0.3 and 28.0.1, there is a potential for a cross-site scripting attack in the survey_accounts module if a user provides an invalid visit label. While the data is properly JSON encoded, the Content-Type header is not set causing the web browser to interpret the payload as HTML, opening the possibility of a cross-site scripting if a user is tricked into following an invalid link. This vulnerability is fixed in 27.0.3 and 28.0.1.
INFO
Published Date :
April 8, 2026, 7:25 p.m.
Last Modified :
July 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update LORIS to version 27.0.3 or later.
- Update LORIS to version 28.0.1 or later.
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-2026-35403.
| URL | Resource |
|---|---|
| https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p | Patch 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-2026-35403 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-2026-35403
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-2026-35403 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-35403 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.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: LORIS de aces, Description: LORIS (Longitudinal Online Research and Imaging System) es una aplicación web autoalojada que proporciona gestión de datos y proyectos para la investigación en neuroimagen. Desde la versión 15.10 hasta antes de la 27.0.3 y la 28.0.1, existe un potencial de ataque de cross-site scripting en el módulo survey_accounts si un usuario proporciona una etiqueta de visita no válida. Aunque los datos están correctamente codificados en JSON, el encabezado Content-Type no está configurado, lo que provoca que el navegador web interprete la carga útil como HTML, abriendo la posibilidad de un cross-site scripting si un usuario es engañado para seguir un enlace no válido. Esta vulnerabilidad se corrige en las versiones 27.0.3 y 28.0.1. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'aces', 'product': 'Loris', 'versions': [{'status': 'affected', 'version': '>= 15.10, < 27.0.3'}, {'status': 'affected', 'version': '>= 28.0.0, < 28.0.1'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-35403', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-10T20:42:22.792284Z'} -
Initial Analysis by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:mcgill:loris:28.0.0:*:*:*:*:*:*:* *cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:* versions from (including) 15.10 up to (including) 27.0.2 Added Reference Type GitHub, Inc.: https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p Types: Patch, Vendor Advisory -
New CVE Received by [email protected]
Apr. 08, 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. From 15.10 to before 27.0.3 and 28.0.1, there is a potential for a cross-site scripting attack in the survey_accounts module if a user provides an invalid visit label. While the data is properly JSON encoded, the Content-Type header is not set causing the web browser to interpret the payload as HTML, opening the possibility of a cross-site scripting if a user is tricked into following an invalid link. This vulnerability is fixed in 27.0.3 and 28.0.1. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N Added CWE CWE-79 Added Reference https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p