CVE-2026-42539

Name: CVE-2026-42539
Creator: NVD / NIST
Published: 2026-06-04T22:16:53.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2026-42539 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 return sensitive data to the user which are not required for the client’s operation. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 return sensitive data to the user which are not required for the client’s operation. Version 2.4.28 contains a patch.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.23%

14.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-201

References

Timeline

Published: Jun 4, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-42539?

How severe is CVE-2026-42539?

CVE-2026-42539 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2026-42539?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-42539?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST