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PatchSiren cyber security CVE debrief

CVE-2026-42543 dfir-iris CVE debrief

CVE-2026-42543 is a cross-site request forgery (CSRF) vulnerability in IRIS, a web collaborative platform used by incident responders. The vulnerability exists in versions prior to 2.4.28 and is caused by the platform's use of the HTTP `GET` method to change state on the server, making it susceptible to CSRF attacks. The vulnerability has a CVSS score of 4.3 and is classified as medium severity. A patch for this vulnerability is available in version 2.4.28.

Vendor
dfir-iris
Product
iris-web
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Incident responders and administrators using IRIS web collaborative platform versions prior to 2.4.28 should be aware of this vulnerability and take steps to upgrade to version 2.4.28 or apply necessary patches.

Technical summary

The IRIS web collaborative platform is vulnerable to cross-site request forgery (CSRF) attacks due to its use of the HTTP `GET` method to change state on the server. This allows an attacker to trick a user into performing unintended actions on the platform. The vulnerability has been patched in version 2.4.28.

Defensive priority

Medium

Recommended defensive actions

  • Upgrade to IRIS version 2.4.28 or later
  • Apply necessary patches to vulnerable versions

Evidence notes

CVE-2026-42543 has been verified through official sources, including the CVE record and NVD detail pages.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42543 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42543

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-42543 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42543

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.