CVE-2026-35446 PUBLISHED

LORIS has a path traversal in FilesDownloadHandler

Assigner: GitHub_M
Reserved: 02.04.2026 Published: 08.04.2026 Updated: 08.04.2026

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 24.0.0 to before 27.0.3 and 28.0.1, an incorrect order of operations in the FilesDownloadHandler could result in an attacker escaping the intended download directories. This vulnerability is fixed in 27.0.3 and 28.0.1.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS Score: 7.7

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	aces
Product	Loris
Versions	Version >= 24.0.0, < 27.0.3 is affected Version >= 28.0.0, < 28.0.1 is affected

References

https://github.com/aces/Loris/security/advisories/GHSA-47jj-7xfg-8759

Problem Types

CWE-552: Files or Directories Accessible to External Parties CWE