CVE-2026-29204

CRITICALNVD 9.110.0▲
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-12. NVD baseline CVSS 9.1; sources differ by 0.9.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

Insufficient ownership check in clientarea.php allows an authenticated client area user to submit requests using another user’s addonId without any ownership validation leading to unauthorized access to the victim's account.

CVSS v3
9.1
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

May 12, 2026

Last Modified

May 13, 2026

Advisory Details (2)

Auto-updated Aug 1, 2026
No patch confirmed yet.
generic

CVE-2026-29204 - WHMCS Security Update 05/12/2026    | Other | Guides & Tutorials

https://help.whmcs.com/m/125386/l/2073908-cve-2026-29204
generic

CVE-2026-29204 - WHMCS Security Update 05/13/2026    | Other | Guides & Tutorials

https://help.whmcs.com/m/125386/l/2073908-cve-2026-29204?token=_4RH-0s0febHsrNiC8GdPymsqg3_nSdT

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 35× 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 334 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-29204?
CVE-2026-29204 is a critical vulnerability published on May 12, 2026. Insufficient ownership check in clientarea.php allows an authenticated client area user to submit requests using another user’s addonId without any ownership validation leading to unauthorized access to the victim's account.
When was CVE-2026-29204 disclosed?
CVE-2026-29204 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-29204 actively exploited?
CVE-2026-29204 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.3% of all scored CVEs.
What is the CVSS score of CVE-2026-29204?
CVE-2026-29204 has a CVSS v3 base score of 9.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 10.0.
How do I remediate CVE-2026-29204?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-29204, 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

Explore the affected products and dependency analysis for CVE-2026-29204

Explore →

Is Your Infrastructure Affected by CVE-2026-29204?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs