CVE-2026-42540: IRIS Insecure Direct Object Reference API Vulnerability (CWE-915)

Technical summary

CVE-2026-42540 is an insecure direct object reference (CWE-915) vulnerability in IRIS that permits authenticated attackers to update arbitrary database values via manipulated API calls. The vulnerability exists in versions prior to 2.4.28 and has been patched in version 2.4.28. With a CVSS 3.1 score of 4.3 (MEDIUM severity), the attack vector is network-based, requires valid user credentials, and results in unauthorized modification of data without requiring user interaction at the target. No confidentiality or availability impact is present.

Business impact

For incident response teams relying on IRIS, this vulnerability creates a risk of data tampering that could undermine the integrity of investigation records. A malicious insider or compromised user account could alter case details, evidence notes, or findings, potentially affecting forensic accuracy, compliance documentation, or post-incident reporting. Given that IRIS is used during active security investigations, even limited data modification could introduce doubt about investigation completeness or create gaps in evidence chain-of-custody records.

Affected systems

IRIS versions prior to 2.4.28 are affected. The vulnerability requires network access and valid authentication credentials. Teams using unsupported or outdated versions of IRIS are at risk, particularly in multi-user environments where multiple team members have platform access.

Exploitability

Exploitation requires valid IRIS user credentials and network access to the platform. The attack complexity is low—no special conditions or tricks are needed beyond crafting a modified API request. The barrier to exploitation is primarily authentication rather than technical sophistication, making this a concern primarily for insider threats or compromised credentials. Active exploitation in the wild has not been reported to a known exploit database.

Remediation

Upgrade IRIS to version 2.4.28 or later. Verify the upgrade through your vendor's official release notes and changelog. Organizations should prioritize this patch in environments where multiple users have access to sensitive incident data or where insider threat is a consideration.

Patch guidance

Deploy version 2.4.28 or later according to your change management procedures. Before patching production systems, test the upgrade in a staging environment to ensure compatibility with existing configurations and integrations. Review release notes for any breaking changes or configuration updates required. After patching, verify API functionality to confirm the fix is in place.

Detection guidance

Monitor IRIS API logs for unusual PUT or PATCH requests targeting database objects, particularly from user accounts that do not normally perform updates, or requests updating records they do not own. Establish baseline API activity patterns and alert on deviations. Audit database change logs for unexpected modifications to investigation records. Check user login sessions for signs of credential compromise.

Why prioritize this

While this vulnerability carries a MEDIUM severity score and requires authentication, the risk lies in its potential to corrupt sensitive incident investigation records in a context where data integrity is critical to forensic value and compliance. Organizations should prioritize patching in proportion to the sensitivity of investigations documented in IRIS and the number of users with access. It is not an emergency but merits scheduling within normal patch cycles.

Risk score, explained

The CVSS 3.1 score of 4.3 reflects a network-accessible vulnerability with low attack complexity, requiring valid user privileges (PR:L), with no confidentiality or availability impact, but with integrity impact limited to the application layer (I:L). The score appropriately captures the insider/credential-compromise risk profile without overstating the threat, since exploitation does not lead to system compromise or widespread data loss.

Frequently asked questions