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
50%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Aug 22, 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 16× in last 7d / 163× 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 398 total refreshes for this CVE.

  1. 2026-08-28 21:41 UTCEPSS rescore
  2. 2026-08-27 14:25 UTCEPSS rescore
  3. 2026-08-26 14:46 UTCEPSS rescore
  4. 2026-08-25 13:49 UTCEPSS rescore
  5. 2026-08-25 07:11 UTCGHSA enrichment
  6. 2026-08-25 02:51 UTCGHSA enrichment
  7. 2026-08-24 22:27 UTCEG score recompute
  8. 2026-08-24 22:27 UTCGHSA enrichment
  9. 2026-08-24 07:01 UTCGHSA enrichment
  10. 2026-08-23 22:23 UTCGHSA enrichment
  11. 2026-08-23 17:50 UTCGHSA enrichment
  12. 2026-08-23 13:30 UTCGHSA enrichment
  13. 2026-08-23 08:57 UTCGHSA enrichment
  14. 2026-08-23 04:31 UTCEG score recompute
  15. 2026-08-23 04:31 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-21 23:49 UTCEG score recompute
  18. 2026-08-21 23:49 UTCEPSS rescore
  19. 2026-08-21 23:49 UTCGHSA enrichment
  20. 2026-08-21 19:28 UTCGHSA enrichment
  21. 2026-08-21 15:06 UTCGHSA enrichment
  22. 2026-08-21 10:45 UTCGHSA enrichment
  23. 2026-08-21 06:22 UTCGHSA enrichment
  24. 2026-08-21 01:39 UTCEG score recompute
  25. 2026-08-21 01:39 UTCGHSA enrichment
Show 75 more
  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 21:19 UTCGHSA enrichment
  3. 2026-08-20 16:59 UTCGHSA enrichment
  4. 2026-08-20 12:38 UTCGHSA enrichment
  5. 2026-08-20 08:17 UTCEG score recompute
  6. 2026-08-20 08:17 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 12:46 UTCGHSA enrichment
  9. 2026-08-19 08:13 UTCEG score recompute
  10. 2026-08-19 08:13 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 14:54 UTCEG score recompute
  13. 2026-08-17 14:54 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 10:35 UTCGHSA enrichment
  16. 2026-08-17 06:13 UTCGHSA enrichment
  17. 2026-08-17 01:27 UTCGHSA enrichment
  18. 2026-08-16 21:07 UTCGHSA enrichment
  19. 2026-08-16 15:55 UTCEG score recompute
  20. 2026-08-16 15:55 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 11:33 UTCGHSA enrichment
  23. 2026-08-16 07:14 UTCGHSA enrichment
  24. 2026-08-16 02:54 UTCEG score recompute
  25. 2026-08-16 02:54 UTCGHSA enrichment
  26. 2026-08-16 02:14 UTCEPSS rescore
  27. 2026-08-15 22:34 UTCGHSA enrichment
  28. 2026-08-15 18:11 UTCGHSA enrichment
  29. 2026-08-15 13:51 UTCGHSA enrichment
  30. 2026-08-15 09:23 UTCGHSA enrichment
  31. 2026-08-15 01:42 UTCEG score recompute
  32. 2026-08-15 01:42 UTCGHSA enrichment
  33. 2026-08-15 01:30 UTCEPSS rescore
  34. 2026-08-14 21:23 UTCGHSA enrichment
  35. 2026-08-14 17:02 UTCGHSA enrichment
  36. 2026-08-14 12:42 UTCGHSA enrichment
  37. 2026-08-14 08:22 UTCGHSA enrichment
  38. 2026-08-14 04:02 UTCGHSA enrichment
  39. 2026-08-13 23:42 UTCEG score recompute
  40. 2026-08-13 23:42 UTCGHSA enrichment
  41. 2026-08-13 22:00 UTCEPSS rescore
  42. 2026-08-13 19:08 UTCGHSA enrichment
  43. 2026-08-13 13:22 UTCGHSA enrichment
  44. 2026-08-13 09:01 UTCGHSA enrichment
  45. 2026-08-13 04:41 UTCGHSA enrichment
  46. 2026-08-13 00:21 UTCGHSA enrichment
  47. 2026-08-12 20:01 UTCGHSA enrichment
  48. 2026-08-12 15:42 UTCEG score recompute
  49. 2026-08-12 15:42 UTCGHSA enrichment
  50. 2026-08-12 13:51 UTCEPSS rescore
  51. 2026-08-12 10:53 UTCGHSA enrichment
  52. 2026-08-12 06:32 UTCGHSA enrichment
  53. 2026-08-12 02:12 UTCGHSA enrichment
  54. 2026-08-11 21:52 UTCGHSA enrichment
  55. 2026-08-11 17:32 UTCEG score recompute
  56. 2026-08-11 17:32 UTCGHSA enrichment
  57. 2026-08-11 13:04 UTCGHSA enrichment
  58. 2026-08-11 08:43 UTCGHSA enrichment
  59. 2026-08-11 04:23 UTCGHSA enrichment
  60. 2026-08-11 00:03 UTCEG score recompute
  61. 2026-08-11 00:03 UTCGHSA enrichment
  62. 2026-08-11 00:00 UTCEPSS rescore
  63. 2026-08-10 19:43 UTCGHSA enrichment
  64. 2026-08-10 15:23 UTCGHSA enrichment
  65. 2026-08-10 11:03 UTCGHSA enrichment
  66. 2026-08-10 06:42 UTCGHSA enrichment
  67. 2026-08-10 02:22 UTCGHSA enrichment
  68. 2026-08-09 22:02 UTCGHSA enrichment
  69. 2026-08-09 17:42 UTCEG score recompute
  70. 2026-08-09 17:42 UTCGHSA enrichment
  71. 2026-08-09 13:46 UTCEPSS rescore
  72. 2026-08-09 13:22 UTCGHSA enrichment
  73. 2026-08-09 09:03 UTCGHSA enrichment
  74. 2026-08-09 04:43 UTCGHSA enrichment
  75. 2026-08-09 00:23 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 1% probability of exploitation in the next 30 days, which ranks it in the top 49.8% 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

Explore →

Is Your Infrastructure Affected by CVE-2026-54806?

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

Start Free Scan →Browse All CVEs