CVE-2026-54806

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-17. 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 weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

Unauthenticated PHP Object Injection in WP Activity Log <= 5.6.3.1 versions.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: 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%
Exploitation40% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jul 25, 2026
No patch confirmed yet.
generic

PHP Object Injection in WordPress WP Activity Log Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/wp-security-audit-log/vulnerability/wordpress-wp-activity-log-plugin-5-6-3-1-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-54806(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 13× in last 7d / 152× 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 221 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCjoshuavanderpoll/CVE-2026-54806
    First seen Jun 22, 2026

    Unauthenticated PHP Object Injection to RCE in WP Activity Log <= 5.6.3.1 (CVE-2026-54806)

    Open source ↗

Frequently asked(5)

What is CVE-2026-54806?
CVE-2026-54806 is a critical vulnerability published on June 17, 2026. Unauthenticated PHP Object Injection in WP Activity Log <= 5.6.3.1 versions.
When was CVE-2026-54806 disclosed?
CVE-2026-54806 was first published in the National Vulnerability Database on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54806 actively exploited?
CVE-2026-54806 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.6% of all scored CVEs.
What is the CVSS score of CVE-2026-54806?
CVE-2026-54806 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-54806?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54806, 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-2026-54806

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