CVE-2026-4739

CRITICALNVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 80% 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, nvd
9.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.4Exploit: NoneExposed: 0

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

Integer Overflow or Wraparound vulnerability in InsightSoftwareConsortium ITK (‎Modules/ThirdParty/Expat/src/expat modules).This issue affects ITK: before 2.7.1.

CVSS v3
9.4
EG Score
9.4(medium)
EPSS
19.6%
KEV
Not listed

Published

March 24, 2026

Last Modified

May 5, 2026

Advisory Details (1)

Auto-updated May 5, 2026
No patch confirmed yet.
generic

BUG: Prevent integer overflow in potential vulnerable cloned functions by npt-1707 · Pull Request #5351 · InsightSoftwareConsortium/ITK · GitHub

https://github.com/InsightSoftwareConsortium/ITK/pull/5351

Vendor Advisories for CVE-2026-4739(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 39× 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.

Showing the most recent 100 of 116 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-13 22:31 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-06 16:27 UTCEPSS rescore
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-05 02:30 UTCEPSS rescore
  16. 2026-07-01 15:07 UTCEPSS rescore
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 14:06 UTCEPSS rescore
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-24 14:05 UTCEPSS rescore
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  1. 2026-06-23 21:33 UTCEPSS rescore
  2. 2026-06-23 21:33 UTCEPSS rescore
  3. 2026-06-22 14:25 UTCEPSS rescore
  4. 2026-06-22 14:25 UTCEPSS rescore
  5. 2026-06-21 14:56 UTCEPSS rescore
  6. 2026-06-21 14:56 UTCEPSS rescore
  7. 2026-06-21 01:59 UTCEPSS rescore
  8. 2026-06-21 01:59 UTCEPSS rescore
  9. 2026-06-19 19:26 UTCEPSS rescore
  10. 2026-06-19 19:26 UTCEPSS rescore
  11. 2026-06-18 17:52 UTCEPSS rescore
  12. 2026-06-18 17:52 UTCEPSS rescore
  13. 2026-06-17 17:53 UTCEPSS rescore
  14. 2026-06-16 17:53 UTCEPSS rescore
  15. 2026-06-15 17:49 UTCEPSS rescore
  16. 2026-06-15 17:49 UTCEPSS rescore
  17. 2026-06-14 23:18 UTCEPSS rescore
  18. 2026-06-13 23:00 UTCEPSS rescore
  19. 2026-06-12 23:12 UTCEPSS rescore
  20. 2026-06-12 23:12 UTCEPSS rescore
  21. 2026-06-12 06:49 UTCEG score recompute
  22. 2026-06-12 06:49 UTCGHSA enrichment
  23. 2026-06-12 03:12 UTCEG score recompute
  24. 2026-06-12 03:12 UTCGHSA enrichment
  25. 2026-06-11 23:35 UTCEG score recompute
  26. 2026-06-11 23:35 UTCGHSA enrichment
  27. 2026-06-11 14:00 UTCEPSS rescore
  28. 2026-06-10 22:26 UTCEG score recompute
  29. 2026-06-10 22:26 UTCGHSA enrichment
  30. 2026-06-10 22:19 UTCEPSS rescore
  31. 2026-06-10 18:47 UTCEG score recompute
  32. 2026-06-10 18:47 UTCGHSA enrichment
  33. 2026-06-10 15:10 UTCEG score recompute
  34. 2026-06-10 15:10 UTCGHSA enrichment
  35. 2026-06-10 13:22 UTCEPSS rescore
  36. 2026-06-10 09:08 UTCEG score recompute
  37. 2026-06-10 09:08 UTCGHSA enrichment
  38. 2026-06-10 05:29 UTCEG score recompute
  39. 2026-06-10 05:29 UTCGHSA enrichment
  40. 2026-06-10 01:47 UTCEG score recompute
  41. 2026-06-10 01:47 UTCGHSA enrichment
  42. 2026-06-09 19:43 UTCEG score recompute
  43. 2026-06-09 19:43 UTCGHSA enrichment
  44. 2026-06-09 16:05 UTCEG score recompute
  45. 2026-06-09 16:05 UTCGHSA enrichment
  46. 2026-06-08 14:43 UTCEG score recompute
  47. 2026-06-08 14:43 UTCGHSA enrichment
  48. 2026-06-08 14:17 UTCEPSS rescore
  49. 2026-06-08 14:17 UTCEPSS rescore
  50. 2026-06-08 08:26 UTCEG score recompute
  51. 2026-06-08 08:26 UTCGHSA enrichment
  52. 2026-06-08 04:49 UTCEG score recompute
  53. 2026-06-08 04:49 UTCGHSA enrichment
  54. 2026-06-08 01:12 UTCEG score recompute
  55. 2026-06-08 01:12 UTCGHSA enrichment
  56. 2026-06-07 20:00 UTCEG score recompute
  57. 2026-06-07 20:00 UTCGHSA enrichment
  58. 2026-06-07 16:21 UTCEG score recompute
  59. 2026-06-07 16:21 UTCGHSA enrichment
  60. 2026-06-07 15:25 UTCEPSS rescore
  61. 2026-06-07 15:25 UTCEPSS rescore
  62. 2026-06-07 12:43 UTCEG score recompute
  63. 2026-06-07 12:43 UTCGHSA enrichment
  64. 2026-06-06 13:47 UTCEPSS rescore
  65. 2026-06-06 13:47 UTCEPSS rescore
  66. 2026-06-05 22:47 UTCEPSS rescore
  67. 2026-06-05 06:10 UTCEPSS rescore
  68. 2026-06-05 06:10 UTCEPSS rescore
  69. 2026-06-04 13:12 UTCEPSS rescore
  70. 2026-06-04 13:12 UTCEPSS rescore
  71. 2026-06-02 20:13 UTCEPSS rescore
  72. 2026-06-01 13:52 UTCEPSS rescore
  73. 2026-06-01 13:52 UTCEPSS rescore
  74. 2026-05-31 22:30 UTCEPSS rescore
  75. 2026-05-31 22:30 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-4739?
CVE-2026-4739 is a critical vulnerability published on March 24, 2026. Integer Overflow or Wraparound vulnerability in InsightSoftwareConsortium ITK (‎Modules/ThirdParty/Expat/src/expat modules).This issue affects ITK: before 2.7.1.
When was CVE-2026-4739 disclosed?
CVE-2026-4739 was first published in the National Vulnerability Database on March 24, 2026, with the most recent update on May 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4739 actively exploited?
CVE-2026-4739 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-4739?
CVE-2026-4739 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-4739?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4739, 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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