How severe is CVE-2026-42543?

CVE-2026-42543 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-42543 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42543?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42543 have an EU (EUVD) identifier?

Yes. CVE-2026-42543 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34329.

When was CVE-2026-42543 published?

CVE-2026-42543 was published on 2026-06-04 and last updated on 2026-06-17.

CVE-2026-42543

CVE-2026-42543 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-650.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34329
Weakness: CWE-650
Published: 2026-06-04
Last modified: 2026-06-17

Description

IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 are vulnerable to a cross-site request forgery attack, because they use the HTTP method `GET` to change state on the server. Version 2.4.28 contains a patch.

Frequently asked questions

What is CVE-2026-42543?: IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 are vulnerable to a cross-site request forgery attack, because they use the HTTP method `GET` to change state on the server. Version 2.4.28 contains a patch.
How severe is CVE-2026-42543?: CVE-2026-42543 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-42543 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42543?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42543 have an EU (EUVD) identifier?: Yes. CVE-2026-42543 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34329.
When was CVE-2026-42543 published?: CVE-2026-42543 was published on 2026-06-04 and last updated on 2026-06-17.

References

Other CWE-650 vulnerabilities

CVE-2024-28787 — High (CVSS 8.7): IBM Security Verify Access 10.0.0 through 10.0.7 and IBM Application Gateway 20.01 through 24.03 could allow a remote…
CVE-2025-21120 — High (CVSS 8.3): Dell Avamar, versions prior to 19.10 SP1 with patch 338904, contains a Trusting HTTP Permission Methods on the…
CVE-2024-45098 — Medium (CVSS 6.8): IBM Aspera Faspex 5.0.0 through 5.0.9 could allow a user to bypass intended access restrictions and conduct resource…
CVE-2024-45282 — Medium (CVSS 4.3): Fields which are in 'read only' state in Bank Statement Draft in Manage Bank Statements application, could be modified…
CVE-2024-56339 — Low (CVSS 3.7): IBM WebSphere Application Server 9.0 and WebSphere Application Server Liberty 17.0.0.3 through 25.0.0.7 could allow a…

Browse all CWE-650 vulnerabilities →