SBA Research disclosed CVE-2026-42540, a medium-severity mass assignment vulnerability in DFIR-IRIS that affects versions up to and including 2.4.27. The flaw allows authenticated users, including administrators, to manipulate API requests and change backend fields that are not meant to be editable through the GUI, exposing sensitive attributes such as asset type IDs, user UUIDs, usernames, account type, account active status, MFA secrets, and MFA activation state. The issue was traced to request data being loaded without strict field allowlisting across multiple endpoints, including asset type add/update functions and user update functionality.
The advisory says some unauthorized changes are stopped only by database constraints rather than by application-layer validation, showing that the software still attempts prohibited updates. SBA Research said the bug was fixed in DFIR-IRIS 2.4.28 and urged users to upgrade, while also recommending strict allowlists or Data Transfer Objects to limit writable fields. The researchers added that the weakness appears systemic rather than isolated, noting an earlier related flaw, CVE-2026-22783, as evidence that mass assignment issues had not been comprehensively remediated across the codebase.
See affected versions and whether adversaries are exploiting it.
2 events from the most recent confirmed update back to the earliest known activity.
SBA Research published an advisory for CVE-2026-42540, describing a medium-severity mass assignment issue in DFIR-IRIS across multiple API endpoints. The disclosure included exploitation details, impacted fields such as MFA secrets and account attributes, and recommended upgrading to 2.4.28 or later.
DFIR-IRIS addressed a mass assignment vulnerability, later tracked as CVE-2026-42540, in release 2.4.28. The flaw affected versions up to and including 2.4.27 and allowed authenticated users to modify backend fields through crafted API requests.
Vulnerabilities, threat actors, malware, products, organizations, and breaches Mallory has linked to this story.
See whether adversaries are exploiting this yet, and where the affected versions run in your environment.
2 references tracked. Mallory keeps watching after this page renders.
github.com
Open sourceseclists.org
Open sourceMap indicators from this story to your assets and identify affected systems in minutes.
Every observed campaign, victim, and pivot linked to actors named in this story.
Malware, exploits, and IOCs connected to the activity described here.
YARA, Sigma, and Snort rules deployed to your SIEM as soon as they’re published.
Get matching new stories delivered to your team as they break — not the next morning.
Ask questions about this story and take action on the answers.