---
id: CVE-2026-55146
title: LORIS has incorrect access checks in issue_tracker
summary: >-
  LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web
  application that provides data- and project-management for neuroimaging
  research. In versions from 16.0.0 prior to 27.0.4 and from 28.0.0 prior to
  28.0.2, the `…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-862
vendor: aces
product: Loris
affected:
  - 'Loris >= 16.0.0, < 27.0.4'
  - 'Loris >= 28.0.0, < 28.0.2'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T18:24:58.311398Z'
published: '2026-10-30'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T18:25:11.260Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-55146'
references:
  - url: 'https://github.com/aces/Loris/security/advisories/GHSA-c9q6-5f24-p7mj'
    label: 'https://github.com/aces/Loris/security/advisories/GHSA-c9q6-5f24-p7mj'
  - url: 'https://github.com/aces/Loris/pull/10531'
    label: 'https://github.com/aces/Loris/pull/10531'
  - url: >-
      https://github.com/aces/Loris/commit/1856d1b4d48d4412d5a5a845024adb70858ec20d
    label: >-
      https://github.com/aces/Loris/commit/1856d1b4d48d4412d5a5a845024adb70858ec20d
  - url: 'https://github.com/aces/Loris/releases/tag/v27.0.4'
    label: 'https://github.com/aces/Loris/releases/tag/v27.0.4'
  - url: 'https://github.com/aces/Loris/releases/tag/v28.0.2'
    label: 'https://github.com/aces/Loris/releases/tag/v28.0.2'
tags:
  - cve.org
epss: 0.00213
epssPercentile: 0.11668
ingestedAt: '2026-11-05T16:24:31.469Z'
---

## Overview

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. In versions from 16.0.0 prior to 27.0.4 and from 28.0.0 prior to 28.0.2, the `issue_tracker` backend does not correctly verify edit access permissions, although the frontend restricts which issues a user may edit. An authenticated user can submit backend changes to issues outside the user's permitted edit scope. Deployments that no longer use Issue Tracker can disable the module to remove access to the endpoint. This issue is fixed in versions 27.0.4 and 28.0.2.

## Affected

- `Loris >= 16.0.0, < 27.0.4`
- `Loris >= 28.0.0, < 28.0.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.