Is CVE-2026-42540 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-42540 being exploited in the wild.

How severe is CVE-2026-42540?

Medium severity, with a CVSS score of 4.3, published 4 June 2026.

Is there a fix for CVE-2026-42540?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-42540 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-42540?

Check whether you run DFIR-IRIS Iris at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-42540: DFIR-IRIS IRIS mass assignment in API requests

CVE-2026-42540 · Severity: medium · CVSS 4.3 · Published 2026-06-04

IRIS is a collaborative platform used by incident responders to share and manage technical details during security investigations. A vulnerability in the platform's API allows authenticated users to modify sensitive database values that should be restricted, such as user account types, MFA settings, and internal object IDs. This could allow a user to escalate their privileges, disable security features like multi-factor authentication, or disrupt the integrity of investigation data.

Technologies: DFIR-IRIS Iris. Vendors: DFIR-IRIS.

Quick answers

Is CVE-2026-42540 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-42540 being exploited in the wild.
How severe is CVE-2026-42540?: Medium severity, with a CVSS score of 4.3, published 4 June 2026.
Which products and versions are affected?: DFIR-IRIS Iris <= 2.4.27.
Is there a fix for CVE-2026-42540?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-42540 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-42540?: Check whether you run DFIR-IRIS Iris at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A mass assignment vulnerability (CWE-915) exists in IRIS versions prior to 2.4.28. The application's API endpoints for write operations, such as asset type updates, fail to filter sensitive parameters from user-supplied input before binding them to database models. An authenticated attacker can send specially crafted API requests containing additional parameters not exposed in the GUI to modify restricted fields. Impacted data points include Object IDs, account types (e.g., converting a regular account to a ServiceAccount), MFA secrets, and account activation status. The vulnerability is patched in version 2.4.28.

Affected products

DFIR-IRIS IRIS <= 2.4.27

Timeline

2026-05-28: advisory: GitHub Security Advisory published
2026-06-04: disclosed: CVE published to NVD

References

https://github.com/dfir-iris/iris-web/security/advisories/GHSA-w78h-mx7h-qm3h

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