Vulnerability · Published Apr 8, 2026 · Assigned by GitHub_M

CVE-2026-35169LORIS has potential cross-site scripting in help_editor module

High 8.7

In plain English

A high-severity cross-site scripting in Loris from aces. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS 3.1)8.7High

Exploit odds (30 days)0.2%top 94.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From to before 27.0.3 and 28.0.1, the help_editor module of LORIS did not properly sanitize some user supplied variables which could result in a reflected cross-site scripting attack if a user is tricked into following an invalid link. The same input vector could also allow an attacker to download arbitrary markdown files on an unpatched server. This vulnerability is fixed in 27.0.3 and 28.0.1.

Affected products (as reported)

Vendor	Product	Versions
aces	Loris	>= , < 27.0.3>= 28.0.0, < 28.0.1

Weakness: CWE-79, CWE-552 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

References

https://github.com/aces/Loris/security/advisories/GHSA-j2p3-58m2-v6q3 x_refsource_CONFIRM