CVE-2026-73364

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-19. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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.

Customer PHP Object Injection in Flexible Subscriptions <= 1.8.1 versions.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 20, 2026

Advisory Details (1)

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

PHP Object Injection in WordPress Flexible Subscriptions Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/flexible-subscriptions/vulnerability/wordpress-flexible-subscriptions-plugin-1-8-1-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-73364(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 50× in last 7d / 208× 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 236 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73364?
CVE-2026-73364 is a critical vulnerability published on August 19, 2026. Customer PHP Object Injection in Flexible Subscriptions <= 1.8.1 versions.
When was CVE-2026-73364 disclosed?
CVE-2026-73364 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73364 actively exploited?
CVE-2026-73364 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 75.5% of all scored CVEs.
What is the CVSS score of CVE-2026-73364?
CVE-2026-73364 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-73364?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73364, 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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