CVE-2026-35165

LORIS has incorrect access checks in document_repository

MEDIUM
6.5
CVSS Score
Published: April 8, 2026 at 06:23 PM UTC
Updated: July 24, 2026 at 09:20 PM UTC
2 products affected across 2 vendorsLorisLoris

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 21.0.0 to before 27.0.3 and 28.0.1, while the document_repository frontend was restricting file access, the backend endpoint was not correctly verifying access permissions. A user could theoretically download a file that they should not have access to, if they know or can brute force the filename. This vulnerability is fixed in 27.0.3 and 28.0.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

21.0.0 ≤ v ≤ 27.0.228.0.0
v < 27.0.3v < 28.0.1
Affected range stops below 27.0.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 28.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

x_refsource_CONFIRMPatchVendor Advisory
Source: cverecord
https://github.com/aces/Loris/security/advisories/GHSA-qp6x-qfx7-54wp

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-639

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