CVE-2026-54806

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 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(high)
EPSS
43.8%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jun 29, 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 82× in last 7d / 240× 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 240 total refreshes for this CVE.

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

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 ↗

Related CVEs(same CWE)

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 43.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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