How severe is CVE-2026-39985?

CVE-2026-39985 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-39985 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39985?

CVE-2026-39985 primarily affects Mcgill Loris. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-39985?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-39985 have an EU (EUVD) identifier?

Yes. CVE-2026-39985 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20978.

When was CVE-2026-39985 published?

CVE-2026-39985 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-39985

CVE-2026-39985 is a medium-severity vulnerability in Mcgill Loris with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20978
Weakness: CWE-601
Affected product: Mcgill Loris
Published: 2026-04-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-39985?: 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.
How severe is CVE-2026-39985?: CVE-2026-39985 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-39985 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39985?: CVE-2026-39985 primarily affects Mcgill Loris. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-39985?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-39985 have an EU (EUVD) identifier?: Yes. CVE-2026-39985 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20978.
When was CVE-2026-39985 published?: CVE-2026-39985 was published on 2026-04-09 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:*
cpe:2.3:a:mcgill:loris:28.0.0:*:*:*:*:*:*:*

More vulnerabilities in Mcgill Loris

CVE-2026-26984 — High (CVSS 8.8): LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and…
CVE-2026-35169 — High (CVSS 8.7): LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and…
CVE-2026-26985 — High (CVSS 8.1): LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and…
CVE-2026-35446 — High (CVSS 7.7): LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and…
CVE-2026-34392 — High (CVSS 7.5): LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and…
CVE-2026-33350 — High (CVSS 7.5): LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and…

All CVEs affecting Mcgill Loris →

Other CWE-601 (Open Redirect) vulnerabilities

CVE-2018-3774 — Critical (CVSS 10.0): Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open…
CVE-2019-25282 — Critical (CVSS 9.8): V-SOL GPON/EPON OLT Platform v2.03 contains an open redirect vulnerability in the script that allows attackers to…
CVE-2020-36912 — Critical (CVSS 9.8): Plexus anblick Digital Signage Management 3.1.13 contains an open redirect vulnerability in the 'PantallaLogin' script…
CVE-2025-43526 — Critical (CVSS 9.8): This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac…
CVE-2025-55031 — Critical (CVSS 9.8): Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An…
CVE-2024-22891 — Critical (CVSS 9.8): Nteract v.0.28.0 was discovered to contain a remote code execution (RCE) vulnerability via the Markdown link.

Browse all CWE-601 (Open Redirect) vulnerabilities →