Vulnerability · Published Apr 8, 2026 · Assigned by GitHub_M

CVE-2026-34392LORIS has a path traversal in static router

High 7.5

In plain English

A high-severity security flaw 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 0.3% (higher than 17% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 82.9% 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 20.0.0 to before 27.0.3 and 28.0.1, a bug in the static file router can allow an attacker to traverse outside of the intended directory, allowing unintended files to be downloaded through the static, css, and js endpoints. This vulnerability is fixed in 27.0.3 and 28.0.1.

Affected products (as reported)

Vendor	Product	Versions
aces	Loris	>= 20.0.0, < 27.0.3>= 28.0.0, < 28.0.1

Weakness: CWE-552 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/aces/Loris/security/advisories/GHSA-rfj5-58hv-wc5f x_refsource_CONFIRM