CVE-2026-55147
LORIS has incorrect access checks in API for Imaging Browser
CVE-2026-55147 is a medium vulnerability (CVSS 6.3) in Aces Loris, published October 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 11th percentile. No source names a fixed version.
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 22.0.0 prior to 27.0.4 and from 28.0.0 prior to 28.0.2, the API for the imaging_browser module permits edits to imaging data without checking the frontend permissions that restrict editing in Imaging Browser. An authenticated API caller can therefore modify imaging data without the required edit authorization. Deployments that no longer use the API can disable it to remove access to this endpoint. This issue is fixed in versions 27.0.4 and 28.0.2.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
6.3
LORIS has incorrect access checks in API for Imaging Browser
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 22.0.0 prior to 27.0.4 and from 28.0.0 prior to 28.0.2, the API for the imaging_browser module permits edits to imaging data without checking the frontend permissions that restrict editing in Imaging Browser. An authenticated API caller can therefore modify imaging data without the required edit authorization. Deployments that no longer use the API can disable it to remove access to this endpoint. This issue is fixed in versions 27.0.4 and 28.0.2.
- Record
CVE-2026-55147- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-862
- Updated
- 2026-11-02
EUVDEUVD-2026-114516
6.3
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 22.0.0 prior to 27.0.4 and from 28.0.0 prior to 28.0.2, the API for the imaging_browser module permits edits to imaging data without checking the frontend permissions that restrict editing in Imaging Browser. An authenticated API caller can therefore modify imaging data without the required edit authorization. Deployments that no longer use the API can disable it to remove access to this endpoint. This issue is fixed in versions 27.0.4 and 28.0.2.
- Record
EUVD-2026-114516- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
NVD
6.3
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 22.0.0 prior to 27.0.4 and from 28.0.0 prior to 28.0.2, the API for the imaging_browser module permits edits to imaging data without checking the frontend permissions that restrict editing in Imaging Browser. An authenticated API caller can therefore modify imaging data without the required edit authorization. Deployments that no longer use the API can disable it to remove access to this endpoint. This issue is fixed in versions 27.0.4 and 28.0.2.
- Record
CVE-2026-55147- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-862
- Updated
- 2026-11-03
OSV
6.3
LORIS has incorrect access checks in API for Imaging Browser
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 22.0.0 prior to 27.0.4 and from 28.0.0 prior to 28.0.2, the API for the imaging_browser module permits edits to imaging data without checking the frontend permissions that restrict editing in Imaging Browser. An authenticated API caller can therefore modify imaging data without the required edit authorization. Deployments that no longer use the API can disable it to remove access to this endpoint. This issue is fixed in versions 27.0.4 and 28.0.2.
- Record
CVE-2026-55147- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-862
- Updated
- 2026-11-03
Affected products
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-02 | created | CVE List, EUVD, NVD, OSV |
References
github.com/aces/Loris/security/advisories/GHSA-m48r-jv24-jjcx
github.com/aces/Loris/pull/10531
github.com/aces/Loris/commit/b13053597530ee33fbced35085d2490bc9ccc03a
github.com/aces/Loris/releases/tag/v27.0.4
github.com/aces/Loris/releases/tag/v28.0.2
github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55147.json
nvd.nist.gov/vuln/detail/CVE-2026-55147