Vulnerability · Published Apr 8, 2026 · Assigned by GitHub_M

CVE-2026-35165LORIS has incorrect access checks in document_repository

Medium 6.3

In plain English

A medium-severity authorization bypass via user-controlled key 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 6% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.2%top 93.8% 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 21.0.0 to before 27.0.3 and 28.0.1, while the document_repository frontend was restricting file access, the backend endpoint was not correctly verifying access permissions. A user could theoretically download a file that they should not have access to, if they know or can brute force the filename. This vulnerability is fixed in 27.0.3 and 28.0.1.

Affected products (as reported)

Vendor	Product	Versions
aces	Loris	>= 21.0.0, < 27.0.3>= 28.0.0, < 28.0.1

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References

https://github.com/aces/Loris/security/advisories/GHSA-qp6x-qfx7-54wp x_refsource_CONFIRM