CVE-2026-65891

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-29. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

Joomla Extension - joomlacontenteditor.net - Creation of hidden files and unintended file overwrite via rename function in Joomla Content Editor (JCE) < 2.20.2 - Improper input validation in the file rename functionality allowed an authenticated user with file management permissions to rename files to otherwise invalid names, resulting in the creation of hidden files. The issue also allowed existing files at the destination path to be unintentionally replaced.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

July 29, 2026

Last Modified

August 5, 2026

Advisory Details (1)

Auto-updated Jul 30, 2026
No patch confirmed yet.
generic

Home

https://www.joomlacontenteditor.net/

Vendor Advisories for CVE-2026-65891(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 16× in last 7d / 76× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 23:21 UTCEG score recompute
  3. 2026-08-29 23:21 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 22:03 UTCEG score recompute
  6. 2026-08-27 22:03 UTCGHSA enrichment
  7. 2026-08-26 19:39 UTCEG score recompute
  8. 2026-08-26 19:39 UTCGHSA enrichment
  9. 2026-08-26 14:47 UTCEPSS rescore
  10. 2026-08-25 15:51 UTCEG score recompute
  11. 2026-08-25 15:51 UTCGHSA enrichment
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-24 13:28 UTCEG score recompute
  14. 2026-08-24 13:28 UTCGHSA enrichment
  15. 2026-08-23 11:04 UTCEG score recompute
  16. 2026-08-23 11:04 UTCGHSA enrichment
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 08:40 UTCEG score recompute
  19. 2026-08-22 08:40 UTCGHSA enrichment
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-21 06:16 UTCEG score recompute
  22. 2026-08-21 06:16 UTCGHSA enrichment
  23. 2026-08-20 22:56 UTCEPSS rescore
  24. 2026-08-20 03:52 UTCEG score recompute
  25. 2026-08-20 03:52 UTCGHSA enrichment
Show 63 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-19 01:21 UTCEG score recompute
  3. 2026-08-19 01:21 UTCGHSA enrichment
  4. 2026-08-18 13:48 UTCEPSS rescore
  5. 2026-08-17 22:57 UTCGHSA enrichment
  6. 2026-08-16 20:32 UTCEG score recompute
  7. 2026-08-16 20:32 UTCGHSA enrichment
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-15 18:08 UTCEG score recompute
  10. 2026-08-15 18:08 UTCGHSA enrichment
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-14 15:43 UTCEG score recompute
  13. 2026-08-14 15:43 UTCGHSA enrichment
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 13:19 UTCEG score recompute
  16. 2026-08-13 13:19 UTCGHSA enrichment
  17. 2026-08-12 13:51 UTCEPSS rescore
  18. 2026-08-12 10:56 UTCEG score recompute
  19. 2026-08-12 10:56 UTCGHSA enrichment
  20. 2026-08-11 08:32 UTCEG score recompute
  21. 2026-08-11 08:32 UTCGHSA enrichment
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-10 06:08 UTCEG score recompute
  24. 2026-08-10 06:08 UTCGHSA enrichment
  25. 2026-08-09 13:47 UTCEPSS rescore
  26. 2026-08-09 03:45 UTCEG score recompute
  27. 2026-08-09 03:45 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 01:21 UTCEG score recompute
  30. 2026-08-08 01:21 UTCGHSA enrichment
  31. 2026-08-06 22:57 UTCEG score recompute
  32. 2026-08-06 22:57 UTCGHSA enrichment
  33. 2026-08-06 13:47 UTCEPSS rescore
  34. 2026-08-05 20:34 UTCEG score recompute
  35. 2026-08-05 20:34 UTCGHSA enrichment
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 19:17 UTCEPSS rescore
  38. 2026-08-05 18:33 UTCGHSA enrichment
  39. 2026-08-04 16:09 UTCEG score recompute
  40. 2026-08-04 16:09 UTCGHSA enrichment
  41. 2026-08-04 15:10 UTCEPSS rescore
  42. 2026-08-04 10:39 UTCEPSS rescore
  43. 2026-08-03 13:45 UTCEG score recompute
  44. 2026-08-03 13:45 UTCGHSA enrichment
  45. 2026-08-03 10:36 UTCEPSS rescore
  46. 2026-08-02 11:20 UTCEG score recompute
  47. 2026-08-02 11:20 UTCGHSA enrichment
  48. 2026-08-02 02:27 UTCEPSS rescore
  49. 2026-08-01 08:56 UTCEG score recompute
  50. 2026-08-01 08:56 UTCGHSA enrichment
  51. 2026-08-01 04:16 UTCEPSS rescore
  52. 2026-07-31 06:32 UTCEG score recompute
  53. 2026-07-31 06:31 UTCGHSA enrichment
  54. 2026-07-30 16:28 UTCEPSS rescore
  55. 2026-07-30 14:38 UTCGHSA enrichment
  56. 2026-07-30 14:27 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  57. 2026-07-30 14:07 UTCNVD update
  58. 2026-07-30 14:07 UTCEG score recompute▲ 6.50
  59. 2026-07-30 14:07 UTCGHSA enrichment
  60. 2026-07-30 14:06 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  61. 2026-07-29 13:37 UTCNVD update
  62. 2026-07-29 13:18 UTCEG score recompute
  63. 2026-07-29 13:17 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-65891?
CVE-2026-65891 is a medium vulnerability published on July 29, 2026. Joomla Extension - joomlacontenteditor.net - Creation of hidden files and unintended file overwrite via rename function in Joomla Content Editor (JCE) < 2.20.2 - Improper input validation in the file rename functionality allowed an authenticated user with file management permissions to rename files…
When was CVE-2026-65891 disclosed?
CVE-2026-65891 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65891 actively exploited?
CVE-2026-65891 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 83.2% of all scored CVEs.
What is the CVSS score of CVE-2026-65891?
CVE-2026-65891 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-65891?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65891, 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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