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TI-2026-83418 Aliases CVE-2026-55146

Missing authorization in LORIS issue tracker lets users edit issues

Priority LOW 19CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

LORIS from 16.0.0 before 27.0.4 and from 28.0.0 before 28.0.2 lacks authorization checks in its issue_tracker backend (CWE-862). The frontend restricts which issues a user may edit, but the backend does not verify edit permissions. An authenticated user can submit backend changes to issues outside their permitted edit scope.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00213 11th percentileScored 2026-11-07
Fix Fixed Loris (aces): 27.0.4, 28.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
acesLoris16.0.0 to before 27.0.4; 28.0.0 to before 28.0.227.0.4, 28.0.2Patch availableCNA
  • Loris Vendoraces Affected 16.0.0 to before 27.0.4; 28.0.0 to before 28.0.2 Fixed in 27.0.4, 28.0.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:*——aces
  • cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:* Versions — — ·aces

Remediation

Fixed versions are 27.0.4 and 28.0.2. Deployments that no longer use Issue Tracker can disable the module to remove access to the endpoint.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Loris (aces) Fixed in 27.0.4, 28.0.2

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-55146
  2. 2026-11-06 CISA SSVC decision points changed

References

Other 5

  • TI-2026-21463 LORIS media module vulnerable to remote code execution CVSS 3.1HIGH 8.8
  • TI-2026-27323 LORIS has potential cross-site scripting in help_editor module CVSS 3.1HIGH 8.7
  • TI-2026-26678 LORIS has a path traversal in static router CVSS 3.1HIGH 7.5
  • TI-2026-25756 LORIS has a SQL injection in MRI feedback popup CVSS 3.1HIGH 7.5
  • TI-2026-27577 LORIS has a path traversal in FilesDownloadHandler CVSS 3.1HIGH 8.6
  • TI-2026-21464 LORIS vulnerable to path traversal in electrophysiology_browser CVSS 3.1HIGH 8.1
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences