What is CVE-2026-35446?

CVE-2026-35446 is a high-severity vulnerability in Aces Loris, classified under Files or Directories Accessible to External Parties. CVSS score: 7.7/10. Published 2026-04-08.

How severe is CVE-2026-35446?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Aces Loris

CVE-2026-35446

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.

EPSS: 0.002 (14.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Aces Loris — versions >= 24.0.0, < 27.0.3, >= 28.0.0, < 28.0.1
Mcgill Loris — versions 28.0.0

Weakness classification (CWE)

CWE-552 — Files or Directories Accessible to External Parties

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-35446?: CVE-2026-35446 is a high-severity vulnerability in Aces Loris, classified under Files or Directories Accessible to External Parties. CVSS score: 7.7/10. Published 2026-04-08.
How severe is CVE-2026-35446?: High severity. CVSS v3 base score is 7.7 out of 10.