CVE-2026-39556

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 Konsept <= 1.9 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 Konsept Theme - Patchstack

https://patchstack.com/database/wordpress/theme/konsept/vulnerability/wordpress-konsept-theme-1-9-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-39556(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 11× in last 7d / 96× 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 218 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 22:25 UTCEG score recompute
  6. 2026-08-24 22:25 UTCGHSA enrichment
  7. 2026-08-24 06:54 UTCGHSA enrichment
  8. 2026-08-23 16:20 UTCGHSA enrichment
  9. 2026-08-23 04:26 UTCEG score recompute
  10. 2026-08-23 04:26 UTCGHSA enrichment
  11. 2026-08-23 00:19 UTCEPSS rescore
  12. 2026-08-21 23:49 UTCEPSS rescore
  13. 2026-08-21 19:33 UTCGHSA enrichment
  14. 2026-08-21 07:51 UTCEG score recompute
  15. 2026-08-21 07:51 UTCGHSA enrichment
  16. 2026-08-20 22:55 UTCEPSS rescore
  17. 2026-08-20 20:09 UTCGHSA enrichment
  18. 2026-08-20 08:14 UTCEG score recompute
  19. 2026-08-20 08:14 UTCGHSA enrichment
  20. 2026-08-19 17:03 UTCEPSS rescore
  21. 2026-08-19 08:11 UTCEG score recompute
  22. 2026-08-19 08:11 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-17 11:06 UTCGHSA enrichment
Show 75 more
  1. 2026-08-16 23:25 UTCEG score recompute
  2. 2026-08-16 23:25 UTCGHSA enrichment
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 11:38 UTCEG score recompute
  5. 2026-08-16 11:38 UTCGHSA enrichment
  6. 2026-08-16 02:14 UTCEPSS rescore
  7. 2026-08-15 23:57 UTCGHSA enrichment
  8. 2026-08-15 12:15 UTCEG score recompute
  9. 2026-08-15 12:15 UTCGHSA enrichment
  10. 2026-08-15 01:30 UTCEPSS rescore
  11. 2026-08-15 00:33 UTCGHSA enrichment
  12. 2026-08-14 12:52 UTCGHSA enrichment
  13. 2026-08-14 01:10 UTCEG score recompute
  14. 2026-08-14 01:10 UTCGHSA enrichment
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-13 13:28 UTCGHSA enrichment
  17. 2026-08-13 01:47 UTCGHSA enrichment
  18. 2026-08-12 14:05 UTCEG score recompute
  19. 2026-08-12 14:05 UTCGHSA enrichment
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-12 02:22 UTCGHSA enrichment
  22. 2026-08-11 14:40 UTCEG score recompute
  23. 2026-08-11 14:40 UTCGHSA enrichment
  24. 2026-08-11 13:43 UTCEPSS rescore
  25. 2026-08-11 02:59 UTCEG score recompute
  26. 2026-08-11 02:59 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 15:17 UTCGHSA enrichment
  29. 2026-08-10 03:35 UTCGHSA enrichment
  30. 2026-08-09 15:54 UTCEG score recompute
  31. 2026-08-09 15:54 UTCGHSA enrichment
  32. 2026-08-09 13:46 UTCEPSS rescore
  33. 2026-08-09 04:12 UTCEG score recompute
  34. 2026-08-09 04:12 UTCGHSA enrichment
  35. 2026-08-08 16:37 UTCEPSS rescore
  36. 2026-08-08 16:31 UTCGHSA enrichment
  37. 2026-08-08 04:49 UTCGHSA enrichment
  38. 2026-08-07 17:08 UTCEG score recompute
  39. 2026-08-07 17:08 UTCGHSA enrichment
  40. 2026-08-07 05:26 UTCGHSA enrichment
  41. 2026-08-06 17:44 UTCEG score recompute
  42. 2026-08-06 17:44 UTCGHSA enrichment
  43. 2026-08-06 13:46 UTCEPSS rescore
  44. 2026-08-06 06:02 UTCEG score recompute
  45. 2026-08-06 06:02 UTCGHSA enrichment
  46. 2026-08-05 19:17 UTCEPSS rescore
  47. 2026-08-05 18:20 UTCGHSA enrichment
  48. 2026-08-05 03:50 UTCGHSA enrichment
  49. 2026-08-04 15:27 UTCEG score recompute
  50. 2026-08-04 15:27 UTCGHSA enrichment
  51. 2026-08-04 15:10 UTCEPSS rescore
  52. 2026-08-04 10:38 UTCEPSS rescore
  53. 2026-08-03 20:46 UTCEG score recompute
  54. 2026-08-03 20:46 UTCGHSA enrichment
  55. 2026-08-03 10:36 UTCEPSS rescore
  56. 2026-08-03 09:04 UTCGHSA enrichment
  57. 2026-08-02 21:21 UTCGHSA enrichment
  58. 2026-08-02 09:40 UTCEG score recompute
  59. 2026-08-02 09:40 UTCGHSA enrichment
  60. 2026-08-02 02:27 UTCEPSS rescore
  61. 2026-08-01 21:58 UTCGHSA enrichment
  62. 2026-08-01 10:16 UTCEG score recompute
  63. 2026-08-01 10:16 UTCGHSA enrichment
  64. 2026-08-01 04:16 UTCEPSS rescore
  65. 2026-07-31 22:33 UTCGHSA enrichment
  66. 2026-07-31 10:22 UTCGHSA enrichment
  67. 2026-07-30 22:40 UTCEG score recompute
  68. 2026-07-30 22:40 UTCGHSA enrichment
  69. 2026-07-30 16:28 UTCEPSS rescore
  70. 2026-07-30 03:41 UTCEG score recompute
  71. 2026-07-30 03:41 UTCGHSA enrichment
  72. 2026-07-30 01:30 UTCEPSS rescore
  73. 2026-07-29 13:54 UTCGHSA enrichment
  74. 2026-07-29 02:12 UTCEG score recompute
  75. 2026-07-29 02:12 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39556?
CVE-2026-39556 is a high vulnerability published on June 17, 2026. Unauthenticated PHP Object Injection in Konsept <= 1.9 versions.
When was CVE-2026-39556 disclosed?
CVE-2026-39556 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-2026-39556 actively exploited?
CVE-2026-39556 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-2026-39556?
CVE-2026-39556 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-39556?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39556, 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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