Is CVE-2026-42538 actively exploited?

No active exploitation of CVE-2026-42538 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42538 be exploited remotely?

Yes. CVE-2026-42538 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42538?

CVE-2026-42538 has a CVSS score of 6.3 (MEDIUM).

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MEDIUM

CVE-2026-42538

CWE-434Published: June 4, 2026· Updated: Jun 5, 2026

6.3

CVSS v3.1

Official Description

IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 do not properly validate uploaded files. The application can therefore be misused to host phishing pages, amongst other things. This also creates another instance of a Cross-Site Scripting (XSS) vulnerability. Version 2.4.28 contains a patch.

NVD Source

Technical Analysis

CVE-2026-42538 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.3.