CVE-2026-48939

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-07-10), indicating real-world exploitation has been confirmed by US federal agencies. the CNA's CVSS baseline 10.0 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, cna:joomla, epss, ghsa
Trending — 4 sources updated this weekExploited in the wild
10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 20%CVSS: 10.0Exploit: cisa kev · ssvc active · epss top5pct · public exploitExposed: 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
10.0
EG Score
10.0(high)
EG Risk
100(Act)
EG Risk 100/100SSVC: Act

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%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
20%
EPSS %ILE
97%
KEV
⚠ Exploited

Published

June 20, 2026

Last Modified

August 12, 2026

Advisory Details (6)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

iCagenda - Events Management for Joomla!

https://www.icagenda.com/
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
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939
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

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 54× in last 7d / 224× 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 662 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

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/CVE-2026-48939
    First seen Jul 5, 2026

    Pre-auth arbitrary file upload RCE exploit for iCagenda Joomla extension < 4.0.8 (CVSS 10.0)

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-48939.yaml
    First seen Jan 1, 2026

    Joomla iCagenda < 3.9.10 - Unauthenticated Arbitrary File Upload RCE

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

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 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-2026-48939 actively exploited?
Yes. CISA added CVE-2026-48939 to the Known Exploited Vulnerabilities catalog on July 10, 2026, affecting iCagenda iCagenda. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-48939?
CVE-2026-48939 has a CVSS v4.0 base score of 10.0 (CNA self-assessment; NVD's own analysis pending).
Which products are affected by CVE-2026-48939?
CVE-2026-48939 affects iCagenda iCagenda. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-48939

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