CVE-2026-39985

LORIS has an open redirect field on login

MEDIUM
6.1
CVSS Score
Published: April 9, 2026 at 05:08 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
2 products affected across 2 vendorsLorisLoris

Using Loris by aces?

Get instant alerts when new vulnerabilities affect Loris - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.1
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. Prior to 27.0.3 and 28.0.1, the redirect parameter upon login to LORIS was not validating the value of the redirect as being within LORIS, which could be used to trick users into visiting arbitrary URLs if they are given a link with a third party redirect parameter. 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.

v < 27.0.328.0.0 ≤ v < 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 (4)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/aces/Loris/security/advisories/GHSA-rch2-f5fw-cg95
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/aces/Loris/releases/tag/v27.0.3
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/aces/Loris/releases/tag/v28.0.1

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
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-601

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card