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TI-2026-21463 Aliases CVE-2026-26984

LORIS media module vulnerable to remote code execution

Priority MEDIUM 41CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.

Summary

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. Prior to versions 26.0.5, 27.0.2, and 28.0.0, an authenticated user with sufficient privileges can exploit a path traversal vulnerability to upload a malicious file to an arbitrary location on the server. Once uploaded, the file can be used to achieve remote code execution (RCE). An attacker must be authenticated and have the appropriate permissions to exploit this issue. If the server is configured as read-only, remote code execution (RCE) is not possible; however, the malicious file upload may still be achievable. This problem is fixed in LORIS v26.0.5 and above, v27.0.2 and above, and v28.0.0 and above. As a workaround, LORIS administrators can disable the media module if it is not being used.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0077 55th percentileScored 2026-11-07
Fix Fixed Loris (aces): 26.0.5, 27.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
acesLorisbefore 26.0.5; 27.0.0 to before 27.0.226.0.5, 27.0.2Patch availableCNA
  • Loris Vendoraces Affected before 26.0.5; 27.0.0 to before 27.0.2 Fixed in 26.0.5, 27.0.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:*before 26.0.5; 27.0.0 to before 27.0.2Vulnerableaces
  • cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:* Versions before 26.0.5; 27.0.0 to before 27.0.2 Vulnerable ·aces

Remediation

  • Fix · CNA Loris (aces) Fixed in 26.0.5, 27.0.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26984

References

Advisory 1

Other 2

  • 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
  • TI-2026-27539 LORIS has potential cross-site scripting in survey_accounts module CVSS 3.1MEDIUM 6.5
See all 10 →

Sources

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