CVE-2026-42543

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
7.1%
KEV
Not listed

Published

June 4, 2026

Last Modified

June 8, 2026

Advisory Details (2)

Auto-updated Jun 18, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Cross-Site Request Forgery (CSRF) · Advisory · dfir-iris/iris-web · GitHub

https://github.com/dfir-iris/iris-web/security/advisories/GHSA-m73w-v4r5-vw9m
generic Patch Available🟡 PoC Available

oss-security - [SBA-ADV-20260128-03] CVE-2026-42543: DFIR-IRIS before 2.4.28 Cross-Site Request Forgery (CSRF)

http://www.openwall.com/lists/oss-security/2026/05/19/11

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 55× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 11:44 UTCEG score recompute
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-09 19:10 UTCEPSS rescore
  4. 2026-07-08 15:15 UTCEPSS rescore
  5. 2026-07-08 09:30 UTCEG score recompute
  6. 2026-07-07 13:46 UTCEPSS rescore
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 16:27 UTCEPSS rescore
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-06 02:18 UTCEG score recompute
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-03 02:09 UTCEG score recompute
  15. 2026-07-01 23:13 UTCEG score recompute
  16. 2026-07-01 15:06 UTCEPSS rescore
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 20:56 UTCEG score recompute
  19. 2026-06-29 19:24 UTCEG score recompute
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-28 17:52 UTCEG score recompute
  22. 2026-06-28 14:07 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-27 16:20 UTCEG score recompute
  25. 2026-06-27 03:08 UTCEPSS rescore
Show 48 more
  1. 2026-06-26 14:55 UTCEG score recompute
  2. 2026-06-25 13:49 UTCEPSS rescore
  3. 2026-06-25 13:49 UTCEPSS rescore
  4. 2026-06-25 10:26 UTCEG score recompute
  5. 2026-06-24 14:05 UTCEPSS rescore
  6. 2026-06-24 08:59 UTCEG score recompute
  7. 2026-06-23 21:33 UTCEPSS rescore
  8. 2026-06-23 01:52 UTCEG score recompute
  9. 2026-06-22 14:25 UTCEPSS rescore
  10. 2026-06-22 14:25 UTCEPSS rescore
  11. 2026-06-21 14:56 UTCEPSS rescore
  12. 2026-06-21 14:56 UTCEPSS rescore
  13. 2026-06-21 01:59 UTCEPSS rescore
  14. 2026-06-19 23:45 UTCEG score recompute
  15. 2026-06-19 19:25 UTCEPSS rescore
  16. 2026-06-18 21:21 UTCEG score recompute
  17. 2026-06-18 17:52 UTCEPSS rescore
  18. 2026-06-18 17:52 UTCEPSS rescore
  19. 2026-06-17 17:53 UTCEPSS rescore
  20. 2026-06-17 17:24 UTCEG score recompute
  21. 2026-06-16 17:52 UTCEPSS rescore
  22. 2026-06-16 14:19 UTCEG score recompute
  23. 2026-06-15 17:49 UTCEPSS rescore
  24. 2026-06-15 12:03 UTCEG score recompute
  25. 2026-06-14 10:13 UTCEG score recompute
  26. 2026-06-13 23:00 UTCEPSS rescore
  27. 2026-06-13 08:48 UTCEG score recompute
  28. 2026-06-12 23:12 UTCEPSS rescore
  29. 2026-06-12 23:12 UTCEPSS rescore
  30. 2026-06-12 07:23 UTCEG score recompute
  31. 2026-06-11 14:00 UTCEPSS rescore
  32. 2026-06-11 05:58 UTCEG score recompute
  33. 2026-06-10 22:18 UTCEPSS rescore
  34. 2026-06-10 13:22 UTCEPSS rescore
  35. 2026-06-10 13:22 UTCEPSS rescore
  36. 2026-06-10 04:34 UTCEG score recompute
  37. 2026-06-09 03:08 UTCEG score recompute
  38. 2026-06-08 14:17 UTCEPSS rescore
  39. 2026-06-08 14:17 UTCEPSS rescore
  40. 2026-06-08 01:43 UTCEG score recompute
  41. 2026-06-07 15:25 UTCEPSS rescore
  42. 2026-06-07 15:25 UTCEPSS rescore
  43. 2026-06-07 00:19 UTCEG score recompute
  44. 2026-06-06 13:47 UTCEPSS rescore
  45. 2026-06-06 13:47 UTCEPSS rescore
  46. 2026-06-05 22:55 UTCEG score recompute
  47. 2026-06-05 22:47 UTCEPSS rescore
  48. 2026-06-04 21:30 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-42543?
CVE-2026-42543 is a medium vulnerability published on June 4, 2026. 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.
When was CVE-2026-42543 disclosed?
CVE-2026-42543 was first published in the National Vulnerability Database on June 4, 2026, with the most recent update on June 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42543 actively exploited?
CVE-2026-42543 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42543?
CVE-2026-42543 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-42543?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42543, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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