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 — 4 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 Aug 26, 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 37× in last 7d / 37× 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. 2026-08-29 04:44 UTCGHSA enrichment
  2. 2026-08-29 00:20 UTCEG score recompute
  3. 2026-08-29 00:20 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 17:30 UTCGHSA enrichment
  6. 2026-08-28 12:59 UTCGHSA enrichment
  7. 2026-08-28 08:35 UTCGHSA enrichment
  8. 2026-08-28 03:59 UTCGHSA enrichment
  9. 2026-08-27 23:36 UTCGHSA enrichment
  10. 2026-08-27 19:11 UTCGHSA enrichment
  11. 2026-08-27 14:45 UTCEG score recompute
  12. 2026-08-27 14:45 UTCGHSA enrichment
  13. 2026-08-27 14:25 UTCEPSS rescore
  14. 2026-08-27 10:22 UTCGHSA enrichment
  15. 2026-08-27 05:58 UTCGHSA enrichment
  16. 2026-08-27 01:32 UTCGHSA enrichment
  17. 2026-08-26 21:09 UTCGHSA enrichment
  18. 2026-08-26 16:44 UTCEG score recompute
  19. 2026-08-26 16:44 UTCGHSA enrichment
  20. 2026-08-26 14:47 UTCEPSS rescore
  21. 2026-08-26 13:26 UTCGHSA enrichment
  22. 2026-08-26 08:59 UTCGHSA enrichment
  23. 2026-08-26 04:35 UTCGHSA enrichment
  24. 2026-08-26 00:10 UTCGHSA enrichment
  25. 2026-08-25 19:45 UTCGHSA enrichment
Show 12 more
  1. 2026-08-25 15:22 UTCEG score recompute
  2. 2026-08-25 15:22 UTCGHSA enrichment
  3. 2026-08-25 14:56 UTCEG score recompute
  4. 2026-08-25 14:56 UTCGHSA enrichment
  5. 2026-08-25 13:49 UTCEPSS rescore
  6. 2026-08-25 11:36 UTCGHSA enrichment
  7. 2026-08-25 07:13 UTCGHSA enrichment
  8. 2026-08-25 02:49 UTCEG score recompute
  9. 2026-08-25 02:49 UTCGHSA enrichment
  10. 2026-08-24 22:26 UTCEG score recompute
  11. 2026-08-24 21:48 UTCEG score recompute
  12. 2026-08-24 21:47 UTCMITRE cvelistV5first tracked

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 76.4% 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

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