CVE-2026-48939

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-20. 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: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
42.8%
KEV
Not listed

Published

June 20, 2026

Last Modified

July 5, 2026

Advisory Details (5)

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

iCagenda - iCagenda 4.0.8 (Security Release)

https://www.icagenda.com/docs/changelog/icagenda-4-0-8
generic

iCagenda - iCagenda 3.9.15 (Security Release Joomla 3)

https://www.icagenda.com/docs/changelog/icagenda-3-9-15
generic🔴 Active Exploitation

iCagenda Zero Day File Upload RCE Fixed in 4.0.8 | mySites.guru

https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/
generic🟡 PoC Available

GitHub - Polosss/By-Poloss..-..CVE-2026-48939: iCagenda Unauthenticated File Upload to RCE · GitHub

https://github.com/Polosss/By-Poloss..-..CVE-2026-48939
generic

iCagenda - Events Management for Joomla!

https://www.icagenda.com/

Vendor Advisories for CVE-2026-48939(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 0× in last 7d / 0× 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. 2026-07-07 04:03 UTCEG score recompute
  2. 2026-07-07 04:03 UTCGHSA enrichment
  3. 2026-07-06 23:19 UTCEG score recompute
  4. 2026-07-06 23:19 UTCGHSA enrichment
  5. 2026-07-06 18:57 UTCEG score recompute
  6. 2026-07-06 18:57 UTCGHSA enrichment
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 13:36 UTCEG score recompute
  9. 2026-07-06 13:36 UTCGHSA enrichment
  10. 2026-07-06 08:42 UTCEG score recompute
  11. 2026-07-06 08:42 UTCGHSA enrichment
  12. 2026-07-06 04:06 UTCEG score recompute
  13. 2026-07-06 04:06 UTCGHSA enrichment
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-05 23:44 UTCEG score recompute
  16. 2026-07-05 23:44 UTCGHSA enrichment
  17. 2026-07-05 19:22 UTCEG score recompute
  18. 2026-07-05 19:22 UTCGHSA enrichment
  19. 2026-07-05 15:59 UTCNVD updateCVSS v3 → 9.8
  20. 2026-07-05 14:59 UTCEG score recompute
  21. 2026-07-05 14:59 UTCGHSA enrichment
  22. 2026-07-05 14:49 UTCMITRE cvelistV5CVSS v3 → 10
  23. 2026-07-05 10:37 UTCEG score recompute
  24. 2026-07-05 10:37 UTCGHSA enrichment
  25. 2026-07-05 06:11 UTCEG score recompute
Show 75 more
  1. 2026-07-05 06:11 UTCGHSA enrichment
  2. 2026-07-05 02:30 UTCEPSS rescore
  3. 2026-07-05 01:40 UTCEG score recompute
  4. 2026-07-05 01:40 UTCGHSA enrichment
  5. 2026-07-04 21:17 UTCEG score recompute
  6. 2026-07-04 21:17 UTCGHSA enrichment
  7. 2026-07-04 16:52 UTCEG score recompute
  8. 2026-07-04 16:51 UTCGHSA enrichment
  9. 2026-07-04 12:17 UTCEG score recompute
  10. 2026-07-04 12:17 UTCGHSA enrichment
  11. 2026-07-04 07:49 UTCEG score recompute
  12. 2026-07-04 07:49 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 03:02 UTCEG score recompute
  15. 2026-07-04 03:02 UTCGHSA enrichment
  16. 2026-07-03 22:35 UTCEG score recompute
  17. 2026-07-03 22:35 UTCGHSA enrichment
  18. 2026-07-03 18:12 UTCEG score recompute
  19. 2026-07-03 18:12 UTCGHSA enrichment
  20. 2026-07-03 13:48 UTCEG score recompute
  21. 2026-07-03 13:48 UTCGHSA enrichment
  22. 2026-07-03 09:26 UTCEG score recompute
  23. 2026-07-03 09:26 UTCGHSA enrichment
  24. 2026-07-03 05:05 UTCEG score recompute
  25. 2026-07-03 05:05 UTCGHSA enrichment
  26. 2026-07-03 00:41 UTCEG score recompute
  27. 2026-07-03 00:41 UTCGHSA enrichment
  28. 2026-07-02 20:18 UTCEG score recompute
  29. 2026-07-02 20:18 UTCGHSA enrichment
  30. 2026-07-02 15:57 UTCEG score recompute
  31. 2026-07-02 15:57 UTCGHSA enrichment
  32. 2026-07-02 11:35 UTCEG score recompute
  33. 2026-07-02 11:35 UTCGHSA enrichment
  34. 2026-07-02 07:12 UTCEG score recompute
  35. 2026-07-02 07:12 UTCGHSA enrichment
  36. 2026-07-02 02:48 UTCEG score recompute
  37. 2026-07-02 02:48 UTCGHSA enrichment
  38. 2026-07-01 22:27 UTCEG score recompute
  39. 2026-07-01 22:27 UTCGHSA enrichment
  40. 2026-07-01 18:05 UTCEG score recompute
  41. 2026-07-01 18:05 UTCGHSA enrichment
  42. 2026-07-01 15:07 UTCEPSS rescore
  43. 2026-07-01 13:43 UTCEG score recompute
  44. 2026-07-01 13:43 UTCGHSA enrichment
  45. 2026-07-01 09:22 UTCEG score recompute
  46. 2026-07-01 09:21 UTCGHSA enrichment
  47. 2026-07-01 05:00 UTCEG score recompute
  48. 2026-07-01 04:59 UTCGHSA enrichment
  49. 2026-07-01 00:35 UTCEG score recompute
  50. 2026-07-01 00:35 UTCGHSA enrichment
  51. 2026-06-30 23:22 UTCEPSS rescore
  52. 2026-06-30 20:12 UTCEG score recompute▼ 0.20
  53. 2026-06-30 20:11 UTCGHSA enrichment
  54. 2026-06-30 18:38 UTCNVD updateCVSS v3 → 9.8
  55. 2026-06-30 15:49 UTCEG score recompute
  56. 2026-06-30 15:49 UTCGHSA enrichment
  57. 2026-06-30 11:24 UTCEG score recompute
  58. 2026-06-30 11:24 UTCGHSA enrichment
  59. 2026-06-30 06:54 UTCEG score recompute
  60. 2026-06-30 06:54 UTCGHSA enrichment
  61. 2026-06-30 02:31 UTCEG score recompute
  62. 2026-06-30 02:31 UTCGHSA enrichment
  63. 2026-06-29 22:10 UTCEG score recompute
  64. 2026-06-29 22:10 UTCGHSA enrichment
  65. 2026-06-29 17:49 UTCEG score recompute
  66. 2026-06-29 17:48 UTCGHSA enrichment
  67. 2026-06-29 14:06 UTCEPSS rescore
  68. 2026-06-29 14:06 UTCEPSS rescore
  69. 2026-06-29 13:24 UTCEG score recompute
  70. 2026-06-29 13:24 UTCGHSA enrichment
  71. 2026-06-29 09:02 UTCEG score recompute
  72. 2026-06-29 09:02 UTCGHSA enrichment
  73. 2026-06-29 04:40 UTCEG score recompute
  74. 2026-06-29 04:40 UTCGHSA enrichment
  75. 2026-06-29 00:17 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-48939?
CVE-2026-48939 is a critical vulnerability published on June 20, 2026. A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
When was CVE-2026-48939 disclosed?
CVE-2026-48939 was first published in the National Vulnerability Database on June 20, 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-2026-48939 actively exploited?
CVE-2026-48939 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48939?
CVE-2026-48939 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-48939?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48939, 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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