CVE-2026-39554

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-17. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.1Exploit: 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 Fidalgo <= 1.2.2 versions.

CVSS v3
8.1
EG Score
8.1(high)
EPSS
22.6%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jun 18, 2026
No patch confirmed yet.
generic

PHP Object Injection in WordPress Fidalgo Theme - Patchstack

https://patchstack.com/database/wordpress/theme/fidalgo/vulnerability/wordpress-fidalgo-theme-1-2-2-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-39554(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 36× in last 7d / 105× 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 105 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-39554?
CVE-2026-39554 is a high vulnerability published on June 17, 2026. Unauthenticated PHP Object Injection in Fidalgo <= 1.2.2 versions.
When was CVE-2026-39554 disclosed?
CVE-2026-39554 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-2026-39554 actively exploited?
CVE-2026-39554 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39554?
CVE-2026-39554 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-39554?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39554, 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.

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