CVE-2026-4249

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-07-06. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: None knownExposed: 0

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

The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and content. This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of service condition.

Successful exploitation of this vulnerability can disrupt the API Gateway, preventing legitimate API traffic from being processed and impacting complete service availability. The denial of service is persistent, requiring manual intervention to restore normal operations.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

July 6, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 6, 2026
No patch confirmed yet.
generic

Security Advisory WSO2-2026-5236/CVE-2026-4249

https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236/

Vendor Advisories for CVE-2026-4249(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 24× in last 7d / 114× 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 167 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-4249?
CVE-2026-4249 is a high vulnerability published on July 6, 2026. The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and content. This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of service condition.…
When was CVE-2026-4249 disclosed?
CVE-2026-4249 was first published in the National Vulnerability Database on July 6, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4249 actively exploited?
CVE-2026-4249 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.0% of all scored CVEs.
What is the CVSS score of CVE-2026-4249?
CVE-2026-4249 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-4249?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4249, 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.

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