CVE-2026-78265

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-25. 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.

Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.

CVSS v3
9.8
EG Score
9.8(high)
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 24, 2026

Last Modified

August 26, 2026

Advisory Details (1)

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

PHP Object Injection in WordPress The Events Calendar Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/the-events-calendar/vulnerability/wordpress-the-events-calendar-plugin-6-17-2-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-78265(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 / 199× 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 199 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78265?
CVE-2026-78265 is a critical vulnerability published on August 24, 2026. Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
When was CVE-2026-78265 disclosed?
CVE-2026-78265 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78265 actively exploited?
CVE-2026-78265 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-2026-78265?
CVE-2026-78265 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-78265?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78265, 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-2026-78265

Explore →

Is Your Infrastructure Affected by CVE-2026-78265?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs