Vulnerability · Published Apr 8, 2026 · Assigned by GitHub_M

CVE-2026-34985LORIS has incorrect access checks in media module

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 14% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.2%top 86.1% 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 16.1.0 to before 27.0.3 and 28.0.1, While the frontend of the media module filters files that the user should not have access to, the backend was not applying access checks and it would be possible for someone who should not have access to a file to access it if they know the filename. This vulnerability is fixed in 27.0.3 and 28.0.1.

Affected products (as reported)

Vendor	Product	Versions
aces	Loris	>= 16.1.0, < 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-p42c-4gmq-hrjw x_refsource_CONFIRM