CVE-2026-39539

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM 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
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: 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 Alloggio - Hotel Booking <= 2.1.2 versions.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
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 Alloggio - Hotel Booking Theme - Patchstack

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

Vendor Advisories for CVE-2026-39539(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 10× in last 7d / 97× 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 222 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. 2026-08-24 22:29 UTCEG score recompute
  6. 2026-08-24 22:29 UTCGHSA enrichment
  7. 2026-08-23 16:20 UTCGHSA enrichment
  8. 2026-08-23 04:55 UTCEG score recompute
  9. 2026-08-23 04:55 UTCGHSA enrichment
  10. 2026-08-23 00:19 UTCEPSS rescore
  11. 2026-08-21 23:49 UTCEPSS rescore
  12. 2026-08-21 18:49 UTCGHSA enrichment
  13. 2026-08-21 07:25 UTCEG score recompute
  14. 2026-08-21 07:25 UTCGHSA enrichment
  15. 2026-08-20 22:55 UTCEPSS rescore
  16. 2026-08-20 19:44 UTCGHSA enrichment
  17. 2026-08-20 08:22 UTCEG score recompute
  18. 2026-08-20 08:22 UTCGHSA enrichment
  19. 2026-08-19 17:03 UTCEPSS rescore
  20. 2026-08-19 08:15 UTCEG score recompute
  21. 2026-08-19 08:15 UTCGHSA enrichment
  22. 2026-08-18 13:48 UTCEPSS rescore
  23. 2026-08-17 14:43 UTCEG score recompute
  24. 2026-08-17 14:43 UTCGHSA enrichment
  25. 2026-08-17 13:47 UTCEPSS rescore
Show 75 more
  1. 2026-08-17 03:22 UTCGHSA enrichment
  2. 2026-08-16 16:00 UTCEG score recompute
  3. 2026-08-16 16:00 UTCGHSA enrichment
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 04:39 UTCEG score recompute
  6. 2026-08-16 04:39 UTCGHSA enrichment
  7. 2026-08-16 02:14 UTCEPSS rescore
  8. 2026-08-15 17:18 UTCGHSA enrichment
  9. 2026-08-15 05:46 UTCEG score recompute
  10. 2026-08-15 05:46 UTCGHSA enrichment
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-14 18:24 UTCGHSA enrichment
  13. 2026-08-14 07:03 UTCEG score recompute
  14. 2026-08-14 07:03 UTCGHSA enrichment
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-13 19:40 UTCGHSA enrichment
  17. 2026-08-13 08:19 UTCGHSA enrichment
  18. 2026-08-12 20:57 UTCEG score recompute
  19. 2026-08-12 20:57 UTCGHSA enrichment
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-12 09:36 UTCGHSA enrichment
  22. 2026-08-11 22:14 UTCEG score recompute
  23. 2026-08-11 22:14 UTCGHSA enrichment
  24. 2026-08-11 13:43 UTCEPSS rescore
  25. 2026-08-11 10:53 UTCEG score recompute
  26. 2026-08-11 10:53 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 23:32 UTCGHSA enrichment
  29. 2026-08-10 12:10 UTCGHSA enrichment
  30. 2026-08-10 00:49 UTCEG score recompute
  31. 2026-08-10 00:49 UTCGHSA enrichment
  32. 2026-08-09 13:46 UTCEPSS rescore
  33. 2026-08-09 13:28 UTCGHSA enrichment
  34. 2026-08-09 02:07 UTCEG score recompute
  35. 2026-08-09 02:07 UTCGHSA enrichment
  36. 2026-08-08 16:37 UTCEPSS rescore
  37. 2026-08-08 14:46 UTCGHSA enrichment
  38. 2026-08-08 03:24 UTCEG score recompute
  39. 2026-08-08 03:24 UTCGHSA enrichment
  40. 2026-08-07 16:03 UTCGHSA enrichment
  41. 2026-08-07 04:41 UTCGHSA enrichment
  42. 2026-08-06 17:20 UTCEG score recompute
  43. 2026-08-06 17:19 UTCGHSA enrichment
  44. 2026-08-06 13:46 UTCEPSS rescore
  45. 2026-08-06 05:57 UTCEG score recompute
  46. 2026-08-06 05:57 UTCGHSA enrichment
  47. 2026-08-05 19:17 UTCEPSS rescore
  48. 2026-08-05 18:36 UTCGHSA enrichment
  49. 2026-08-05 03:59 UTCGHSA enrichment
  50. 2026-08-04 15:29 UTCEG score recompute
  51. 2026-08-04 15:29 UTCGHSA enrichment
  52. 2026-08-04 15:10 UTCEPSS rescore
  53. 2026-08-04 10:38 UTCEPSS rescore
  54. 2026-08-03 20:10 UTCEG score recompute
  55. 2026-08-03 20:10 UTCGHSA enrichment
  56. 2026-08-03 10:36 UTCEPSS rescore
  57. 2026-08-03 08:48 UTCGHSA enrichment
  58. 2026-08-02 19:23 UTCGHSA enrichment
  59. 2026-08-02 08:02 UTCEG score recompute
  60. 2026-08-02 08:02 UTCGHSA enrichment
  61. 2026-08-02 02:27 UTCEPSS rescore
  62. 2026-08-01 20:40 UTCGHSA enrichment
  63. 2026-08-01 09:18 UTCEG score recompute
  64. 2026-08-01 09:18 UTCGHSA enrichment
  65. 2026-08-01 04:16 UTCEPSS rescore
  66. 2026-07-31 21:56 UTCGHSA enrichment
  67. 2026-07-31 10:10 UTCGHSA enrichment
  68. 2026-07-30 22:47 UTCEG score recompute
  69. 2026-07-30 22:47 UTCGHSA enrichment
  70. 2026-07-30 16:28 UTCEPSS rescore
  71. 2026-07-30 03:47 UTCEG score recompute
  72. 2026-07-30 03:47 UTCGHSA enrichment
  73. 2026-07-30 01:30 UTCEPSS rescore
  74. 2026-07-29 13:49 UTCGHSA enrichment
  75. 2026-07-29 02:27 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-39539?
CVE-2026-39539 is a high vulnerability published on June 17, 2026. Unauthenticated PHP Object Injection in Alloggio - Hotel Booking <= 2.1.2 versions.
When was CVE-2026-39539 disclosed?
CVE-2026-39539 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-2026-39539 actively exploited?
CVE-2026-39539 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 77.0% of all scored CVEs.
What is the CVSS score of CVE-2026-39539?
CVE-2026-39539 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-39539?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39539, 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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