CVE-2026-55146
MEDIUMDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Exploit Intelligence
EPSS data unavailable for this CVE.
References
Related Vulnerabilities
Other CWE-862 (Missing Authorization) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-39226 | Critical | 9.8 | 100% | KEV | Fix |
| CVE-2022-0543 | Critical | 10.0 | 99% | KEV | Fix |
| CVE-2021-21978 | Critical | 9.8 | 99% | - | Fix |
| CVE-2023-52163 | High | 8.8 | 97% | KEV | - |
| CVE-2022-1329 | High | 8.8 | 93% | - | - |
| CVE-2023-6875 | Critical | 9.8 | 90% | - | - |
Common questions
How do I fix CVE-2026-55146?
No published fix for CVE-2026-55146 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
How severe is CVE-2026-55146?
CVE-2026-55146 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-30.