CVE-2026-73373

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-18. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

August 18, 2026

Last Modified

September 3, 2026

Advisory Details (2)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

Joomla Content Management System (CMS) - try it! It's free!

https://www.joomla.org/
generic

[20260810] - Core - Unrestricted uploads of SHTML files

https://developer.joomla.org/security-centre/1077-20260810-core-unrestricted-uploads-of-shtml-files.html

Vendor Advisories for CVE-2026-73373(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 49× in last 7d / 171× 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 198 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73373?
CVE-2026-73373 is a critical vulnerability published on August 18, 2026. Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution.
When was CVE-2026-73373 disclosed?
CVE-2026-73373 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73373 actively exploited?
CVE-2026-73373 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 70.1% of all scored CVEs.
What is the CVSS score of CVE-2026-73373?
CVE-2026-73373 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-73373?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73373, 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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