CVE-2026-66915

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 54% 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
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: None knownExposed: 0

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

Joomla Extension - fabrikar.com - Remote code execution in Fabrik < 4.6.9 - An unauthenticated attacker could execute arbitrary code by using the ajax_calc feature of the calc plugin.

CVSS v3
10.0
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%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 12, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Fabrik Joomla: Update to 4.7.0 | mySites.guru

https://mysites.guru/blog/fabrik-unauthenticated-rce-calc-element/
generic

Fabrik - Joomla Custom Website Application Builder - Home

https://www.fabrikar.com/

Vendor Advisories for CVE-2026-66915(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 52× in last 7d / 86× 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. 2026-08-20 13:09 UTCGHSA enrichment
  2. 2026-08-20 08:43 UTCGHSA enrichment
  3. 2026-08-20 04:23 UTCGHSA enrichment
  4. 2026-08-20 00:03 UTCGHSA enrichment
  5. 2026-08-19 19:41 UTCEG score recompute
  6. 2026-08-19 19:41 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 15:21 UTCGHSA enrichment
  9. 2026-08-19 10:47 UTCGHSA enrichment
  10. 2026-08-19 06:26 UTCGHSA enrichment
  11. 2026-08-19 02:06 UTCGHSA enrichment
  12. 2026-08-18 21:45 UTCGHSA enrichment
  13. 2026-08-18 17:25 UTCEG score recompute
  14. 2026-08-18 17:25 UTCGHSA enrichment
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-18 13:01 UTCGHSA enrichment
  17. 2026-08-18 08:41 UTCGHSA enrichment
  18. 2026-08-18 04:21 UTCGHSA enrichment
  19. 2026-08-17 23:58 UTCGHSA enrichment
  20. 2026-08-17 19:38 UTCGHSA enrichment
  21. 2026-08-17 15:18 UTCEG score recompute
  22. 2026-08-17 15:18 UTCGHSA enrichment
  23. 2026-08-17 13:47 UTCEPSS rescore
  24. 2026-08-17 10:58 UTCGHSA enrichment
  25. 2026-08-17 06:38 UTCGHSA enrichment
Show 61 more
  1. 2026-08-17 02:19 UTCGHSA enrichment
  2. 2026-08-16 21:59 UTCGHSA enrichment
  3. 2026-08-16 17:39 UTCEG score recompute
  4. 2026-08-16 17:39 UTCGHSA enrichment
  5. 2026-08-16 14:56 UTCEPSS rescore
  6. 2026-08-16 13:13 UTCGHSA enrichment
  7. 2026-08-16 08:52 UTCGHSA enrichment
  8. 2026-08-16 04:32 UTCEG score recompute
  9. 2026-08-16 04:32 UTCGHSA enrichment
  10. 2026-08-16 00:12 UTCGHSA enrichment
  11. 2026-08-15 19:52 UTCGHSA enrichment
  12. 2026-08-15 15:32 UTCGHSA enrichment
  13. 2026-08-15 11:12 UTCGHSA enrichment
  14. 2026-08-15 06:52 UTCGHSA enrichment
  15. 2026-08-15 02:24 UTCEG score recompute
  16. 2026-08-15 02:24 UTCGHSA enrichment
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 22:05 UTCGHSA enrichment
  19. 2026-08-14 17:45 UTCGHSA enrichment
  20. 2026-08-14 13:20 UTCGHSA enrichment
  21. 2026-08-14 09:00 UTCGHSA enrichment
  22. 2026-08-14 04:40 UTCGHSA enrichment
  23. 2026-08-14 00:20 UTCEG score recompute
  24. 2026-08-14 00:20 UTCGHSA enrichment
  25. 2026-08-13 22:00 UTCEPSS rescore
  26. 2026-08-13 20:00 UTCGHSA enrichment
  27. 2026-08-13 15:40 UTCGHSA enrichment
  28. 2026-08-13 11:20 UTCGHSA enrichment
  29. 2026-08-13 07:00 UTCGHSA enrichment
  30. 2026-08-13 02:38 UTCGHSA enrichment
  31. 2026-08-12 22:18 UTCGHSA enrichment
  32. 2026-08-12 17:58 UTCEG score recompute
  33. 2026-08-12 17:58 UTCGHSA enrichment
  34. 2026-08-12 13:51 UTCEPSS rescore
  35. 2026-08-12 13:39 UTCGHSA enrichment
  36. 2026-08-12 09:19 UTCEG score recompute
  37. 2026-08-12 09:19 UTCGHSA enrichment
  38. 2026-08-12 09:14 UTCEG score recompute
  39. 2026-08-12 09:14 UTCGHSA enrichment
  40. 2026-08-12 09:02 UTCGHSA enrichment
  41. 2026-08-12 04:42 UTCGHSA enrichment
  42. 2026-08-12 00:22 UTCGHSA enrichment
  43. 2026-08-11 19:56 UTCGHSA enrichment
  44. 2026-08-11 15:37 UTCEG score recompute
  45. 2026-08-11 15:37 UTCGHSA enrichment
  46. 2026-08-11 11:15 UTCGHSA enrichment
  47. 2026-08-11 06:55 UTCGHSA enrichment
  48. 2026-08-11 02:35 UTCEG score recompute
  49. 2026-08-11 02:35 UTCGHSA enrichment
  50. 2026-08-11 00:00 UTCEPSS rescore
  51. 2026-08-10 22:16 UTCGHSA enrichment
  52. 2026-08-10 17:56 UTCGHSA enrichment
  53. 2026-08-10 13:29 UTCEG score recompute
  54. 2026-08-10 13:29 UTCGHSA enrichment
  55. 2026-08-10 13:01 UTCEG score recompute
  56. 2026-08-10 13:01 UTCGHSA enrichment
  57. 2026-08-10 12:24 UTCEG score recompute
  58. 2026-08-10 11:21 UTCEG score recompute
  59. 2026-08-10 10:17 UTCEG score recompute
  60. 2026-08-10 10:01 UTCEG score recompute
  61. 2026-08-10 10:01 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66915?
CVE-2026-66915 is a critical vulnerability published on August 10, 2026. Joomla Extension - fabrikar.com - Remote code execution in Fabrik < 4.6.9 - An unauthenticated attacker could execute arbitrary code by using the ajax_calc feature of the calc plugin.
When was CVE-2026-66915 disclosed?
CVE-2026-66915 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66915 actively exploited?
CVE-2026-66915 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 53.9% of all scored CVEs.
What is the CVSS score of CVE-2026-66915?
CVE-2026-66915 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-66915?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66915, 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-2026-66915

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