CVE-2026-56290

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-29. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 sources updated this weekElevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
27.6%
KEV
Not listed

Published

June 29, 2026

Last Modified

July 5, 2026

Advisory Details (3)

Auto-updated Jul 5, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

PageBuilder CK RCE - CVE-2026-56290 | mySites.guru

https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce/
generic

Nouvelle version de pbck et joomla 3 - JoomlaCK forum

https://forum.joomlack.fr/index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3
generic

Joomlack - Extensions et tutoriels Joomla! - JoomlaCK - Extensions et tutoriels Joomla!

https://www.joomlack.fr/

Vendor Advisories for CVE-2026-56290(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 97× in last 7d / 107× 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 107 total refreshes for this CVE.

  1. 2026-07-07 04:53 UTCEG score recompute
  2. 2026-07-07 04:53 UTCGHSA enrichment
  3. 2026-07-07 00:57 UTCEG score recompute
  4. 2026-07-07 00:57 UTCGHSA enrichment
  5. 2026-07-06 21:00 UTCEG score recompute
  6. 2026-07-06 21:00 UTCGHSA enrichment
  7. 2026-07-06 17:01 UTCEG score recompute
  8. 2026-07-06 17:01 UTCGHSA enrichment
  9. 2026-07-06 16:27 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 13:04 UTCEG score recompute
  12. 2026-07-06 13:04 UTCGHSA enrichment
  13. 2026-07-06 09:03 UTCEG score recompute
  14. 2026-07-06 09:03 UTCGHSA enrichment
  15. 2026-07-06 05:04 UTCEG score recompute
  16. 2026-07-06 05:04 UTCGHSA enrichment
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-06 02:23 UTCEPSS rescore
  19. 2026-07-06 01:05 UTCEG score recompute
  20. 2026-07-06 01:05 UTCGHSA enrichment
  21. 2026-07-05 21:08 UTCEG score recompute
  22. 2026-07-05 21:08 UTCGHSA enrichment
  23. 2026-07-05 17:09 UTCEG score recompute
  24. 2026-07-05 17:09 UTCGHSA enrichment
  25. 2026-07-05 15:59 UTCNVD updateCVSS v3 → 9.8
Show 75 more
  1. 2026-07-05 14:49 UTCMITRE cvelistV5CVSS v3 → 10
  2. 2026-07-05 13:12 UTCEG score recompute
  3. 2026-07-05 13:11 UTCGHSA enrichment
  4. 2026-07-05 09:15 UTCEG score recompute
  5. 2026-07-05 09:14 UTCGHSA enrichment
  6. 2026-07-05 05:18 UTCEG score recompute
  7. 2026-07-05 05:17 UTCGHSA enrichment
  8. 2026-07-05 02:31 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-05 01:21 UTCEG score recompute
  11. 2026-07-05 01:20 UTCGHSA enrichment
  12. 2026-07-04 21:24 UTCEG score recompute
  13. 2026-07-04 21:24 UTCGHSA enrichment
  14. 2026-07-04 17:28 UTCEG score recompute
  15. 2026-07-04 17:28 UTCGHSA enrichment
  16. 2026-07-04 13:30 UTCEG score recompute
  17. 2026-07-04 13:30 UTCGHSA enrichment
  18. 2026-07-04 09:33 UTCEG score recompute
  19. 2026-07-04 09:33 UTCGHSA enrichment
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-04 05:36 UTCEG score recompute
  23. 2026-07-04 05:35 UTCGHSA enrichment
  24. 2026-07-04 01:38 UTCEG score recompute
  25. 2026-07-04 01:37 UTCGHSA enrichment
  26. 2026-07-03 21:40 UTCEG score recompute
  27. 2026-07-03 21:40 UTCGHSA enrichment
  28. 2026-07-03 17:44 UTCEG score recompute
  29. 2026-07-03 17:43 UTCGHSA enrichment
  30. 2026-07-03 13:46 UTCEG score recompute
  31. 2026-07-03 13:46 UTCGHSA enrichment
  32. 2026-07-03 09:49 UTCEG score recompute
  33. 2026-07-03 09:49 UTCGHSA enrichment
  34. 2026-07-03 05:52 UTCEG score recompute
  35. 2026-07-03 05:52 UTCGHSA enrichment
  36. 2026-07-03 01:53 UTCEG score recompute
  37. 2026-07-03 01:53 UTCGHSA enrichment
  38. 2026-07-02 21:56 UTCEG score recompute▼ 0.20
  39. 2026-07-02 21:56 UTCGHSA enrichment
  40. 2026-07-02 20:05 UTCNVD updateCVSS v3 → 9.8
  41. 2026-07-02 18:00 UTCEG score recompute
  42. 2026-07-02 17:59 UTCGHSA enrichment
  43. 2026-07-02 14:03 UTCEG score recompute
  44. 2026-07-02 14:02 UTCGHSA enrichment
  45. 2026-07-02 10:06 UTCEG score recompute
  46. 2026-07-02 10:05 UTCGHSA enrichment
  47. 2026-07-02 06:09 UTCEG score recompute
  48. 2026-07-02 06:09 UTCGHSA enrichment
  49. 2026-07-02 02:12 UTCEG score recompute
  50. 2026-07-02 02:12 UTCGHSA enrichment
  51. 2026-07-01 22:15 UTCEG score recompute
  52. 2026-07-01 22:15 UTCGHSA enrichment
  53. 2026-07-01 18:13 UTCEG score recompute
  54. 2026-07-01 18:13 UTCGHSA enrichment
  55. 2026-07-01 15:07 UTCEPSS rescore
  56. 2026-07-01 14:16 UTCEG score recompute
  57. 2026-07-01 14:16 UTCGHSA enrichment
  58. 2026-07-01 10:19 UTCEG score recompute
  59. 2026-07-01 10:19 UTCGHSA enrichment
  60. 2026-07-01 06:22 UTCEG score recompute
  61. 2026-07-01 06:22 UTCGHSA enrichment
  62. 2026-07-01 02:25 UTCEG score recompute
  63. 2026-07-01 02:25 UTCGHSA enrichment
  64. 2026-06-30 23:22 UTCEPSS rescore
  65. 2026-06-30 22:28 UTCEG score recompute
  66. 2026-06-30 22:28 UTCGHSA enrichment
  67. 2026-06-30 18:31 UTCEG score recompute
  68. 2026-06-30 18:31 UTCGHSA enrichment
  69. 2026-06-30 14:34 UTCEG score recompute
  70. 2026-06-30 14:34 UTCGHSA enrichment
  71. 2026-06-30 10:36 UTCEG score recompute
  72. 2026-06-30 10:36 UTCGHSA enrichment
  73. 2026-06-30 06:39 UTCEG score recompute
  74. 2026-06-30 06:39 UTCGHSA enrichment
  75. 2026-06-30 02:42 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCshinthink/pbck-exploit
    First seen Jul 4, 2026

    📤 Mass exploitation framework for CVE-2026-56290 — Page Builder CK Joomla unauthenticated file upload to RCE

    Open source ↗

Frequently asked(5)

What is CVE-2026-56290?
CVE-2026-56290 is a critical vulnerability published on June 29, 2026. The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
When was CVE-2026-56290 disclosed?
CVE-2026-56290 was first published in the National Vulnerability Database on June 29, 2026, with the most recent update on July 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56290 actively exploited?
CVE-2026-56290 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56290?
CVE-2026-56290 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-56290?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56290, 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-2026-56290

Explore →

Is Your Infrastructure Affected by CVE-2026-56290?

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

Start Free Scan →Browse All CVEs