CVE-2026-66439

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-06. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

Unauthenticated Cross Site Scripting (XSS) in Advanced AJAX Product Filters <= 3.2.0.3 versions.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 12, 2026

References (1)

Vendor Advisories for CVE-2026-66439(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 29× in last 7d / 61× 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. 2026-08-21 05:28 UTCEG score recompute
  2. 2026-08-21 05:28 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 17:55 UTCGHSA enrichment
  5. 2026-08-20 06:23 UTCGHSA enrichment
  6. 2026-08-19 18:50 UTCEG score recompute
  7. 2026-08-19 18:50 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 05:45 UTCGHSA enrichment
  10. 2026-08-18 18:12 UTCEG score recompute
  11. 2026-08-18 18:11 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 04:51 UTCGHSA enrichment
  14. 2026-08-17 17:19 UTCEG score recompute
  15. 2026-08-17 17:18 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 05:45 UTCGHSA enrichment
  18. 2026-08-16 17:39 UTCEG score recompute
  19. 2026-08-16 17:39 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 05:59 UTCEG score recompute
  22. 2026-08-16 05:59 UTCGHSA enrichment
  23. 2026-08-15 18:27 UTCGHSA enrichment
  24. 2026-08-15 06:54 UTCEG score recompute
  25. 2026-08-15 06:54 UTCGHSA enrichment
Show 36 more
  1. 2026-08-15 01:30 UTCEPSS rescore
  2. 2026-08-14 19:20 UTCGHSA enrichment
  3. 2026-08-14 07:43 UTCEG score recompute
  4. 2026-08-14 07:43 UTCGHSA enrichment
  5. 2026-08-13 22:00 UTCEPSS rescore
  6. 2026-08-13 20:10 UTCGHSA enrichment
  7. 2026-08-13 08:38 UTCGHSA enrichment
  8. 2026-08-12 21:05 UTCGHSA enrichment
  9. 2026-08-12 16:56 UTCEG score recompute
  10. 2026-08-12 16:56 UTCGHSA enrichment
  11. 2026-08-12 13:51 UTCEPSS rescore
  12. 2026-08-12 05:23 UTCGHSA enrichment
  13. 2026-08-11 17:50 UTCEG score recompute
  14. 2026-08-11 17:50 UTCGHSA enrichment
  15. 2026-08-11 06:16 UTCEG score recompute
  16. 2026-08-11 06:16 UTCGHSA enrichment
  17. 2026-08-11 00:00 UTCEPSS rescore
  18. 2026-08-10 18:44 UTCGHSA enrichment
  19. 2026-08-10 07:11 UTCGHSA enrichment
  20. 2026-08-09 19:39 UTCEG score recompute
  21. 2026-08-09 19:39 UTCGHSA enrichment
  22. 2026-08-09 13:47 UTCEPSS rescore
  23. 2026-08-09 08:06 UTCGHSA enrichment
  24. 2026-08-08 20:34 UTCEG score recompute
  25. 2026-08-08 20:34 UTCGHSA enrichment
  26. 2026-08-08 16:37 UTCEPSS rescore
  27. 2026-08-08 09:01 UTCGHSA enrichment
  28. 2026-08-07 21:29 UTCEG score recompute
  29. 2026-08-07 21:29 UTCGHSA enrichment
  30. 2026-08-07 09:56 UTCEG score recompute
  31. 2026-08-07 09:56 UTCGHSA enrichment
  32. 2026-08-06 22:23 UTCEG score recompute
  33. 2026-08-06 22:23 UTCGHSA enrichment
  34. 2026-08-06 15:27 UTCEG score recompute
  35. 2026-08-06 14:42 UTCEG score recompute
  36. 2026-08-06 14:41 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-66439?
CVE-2026-66439 is a high vulnerability published on August 6, 2026. Unauthenticated Cross Site Scripting (XSS) in Advanced AJAX Product Filters <= 3.2.0.3 versions.
When was CVE-2026-66439 disclosed?
CVE-2026-66439 was first published in the National Vulnerability Database on August 6, 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-2026-66439 actively exploited?
CVE-2026-66439 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 90.9% of all scored CVEs.
What is the CVSS score of CVE-2026-66439?
CVE-2026-66439 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-66439?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66439, 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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