CVE-2026-39577

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-17. a secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: 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 Playroom <= 1.4.1 versions.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
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 Playroom Theme - Patchstack

https://patchstack.com/database/wordpress/theme/playroom/vulnerability/wordpress-playroom-theme-1-4-1-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-39577(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 14× in last 7d / 57× 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.

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

Frequently asked(5)

What is CVE-2026-39577?
CVE-2026-39577 is a medium vulnerability published on June 17, 2026. Unauthenticated PHP Object Injection in Playroom <= 1.4.1 versions.
When was CVE-2026-39577 disclosed?
CVE-2026-39577 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-2026-39577 actively exploited?
CVE-2026-39577 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 89.2% of all scored CVEs.
What is the CVSS score of CVE-2026-39577?
CVE-2026-39577 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-39577?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39577, 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-2026-39577

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