PT-2026-31429 · Loris · Loris

Published 2026-04-08 · Updated 2026-04-08 · CVE-2026-35403

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N

Name of the Vulnerable Software and Affected Versions LORIS versions 15.10 through 27.0.2 and 28.0.1

Description LORIS, a self-hosted web application for neuroimaging research data and project management, has a potential for a cross-site scripting (XSS) attack in the survey accounts module. This occurs when a user provides an invalid visit label. The system properly JSON encodes the data, but fails to set the Content-Type header, causing the web browser to interpret the payload as HTML. This can lead to XSS if a user is tricked into following a malicious link.

Recommendations Update to version 27.0.3 or 28.0.1

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-35403

Affected Products

Loris

References · 3

• https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35403 · Security Note
• https://twitter.com/CVEnew/status/2041975586940125215 · Twitter Post