CVE-2026-16736

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The User Registration & Membership WordPress plugin before 5.2.6 does not enforce the site's registration-disabled setting when processing registration-form submissions, allowing unauthenticated users to create new accounts even when the administrator has turned off open registration.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 5, 2026

Advisory Details (1)

Auto-updated Aug 5, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

User Registration & Membership < 5.2.6 – Unauthenticated Account Creation While Registration Disabled | CVE 2026-16736 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/dc0d63d6-bcd9-4f14-865a-49d254a831a2/

Vendor Advisories for CVE-2026-16736(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 29× in last 7d / 71× 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. 2026-08-21 05:52 UTCEG score recompute
  2. 2026-08-21 05:52 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 18:13 UTCGHSA enrichment
  5. 2026-08-20 06:34 UTCGHSA enrichment
  6. 2026-08-19 18:55 UTCEG score recompute
  7. 2026-08-19 18:54 UTCGHSA enrichment
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-19 06:48 UTCGHSA enrichment
  10. 2026-08-18 18:56 UTCEG score recompute
  11. 2026-08-18 18:56 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 07:17 UTCGHSA enrichment
  14. 2026-08-17 19:38 UTCEG score recompute
  15. 2026-08-17 19:38 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 07:59 UTCGHSA enrichment
  18. 2026-08-16 20:21 UTCEG score recompute
  19. 2026-08-16 20:21 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 08:42 UTCEG score recompute
  22. 2026-08-16 08:42 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 21:04 UTCGHSA enrichment
  25. 2026-08-15 09:25 UTCEG score recompute
Show 46 more
  1. 2026-08-15 09:25 UTCGHSA enrichment
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 21:46 UTCGHSA enrichment
  4. 2026-08-14 10:08 UTCGHSA enrichment
  5. 2026-08-13 22:29 UTCEG score recompute
  6. 2026-08-13 22:29 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 10:51 UTCGHSA enrichment
  9. 2026-08-12 23:12 UTCEG score recompute
  10. 2026-08-12 23:12 UTCGHSA enrichment
  11. 2026-08-12 13:50 UTCEPSS rescore
  12. 2026-08-12 11:34 UTCGHSA enrichment
  13. 2026-08-11 23:55 UTCEG score recompute
  14. 2026-08-11 23:55 UTCGHSA enrichment
  15. 2026-08-11 13:42 UTCEPSS rescore
  16. 2026-08-11 12:16 UTCGHSA enrichment
  17. 2026-08-11 00:38 UTCEG score recompute
  18. 2026-08-11 00:38 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 12:59 UTCGHSA enrichment
  21. 2026-08-10 01:21 UTCEG score recompute
  22. 2026-08-10 01:21 UTCGHSA enrichment
  23. 2026-08-09 13:46 UTCEPSS rescore
  24. 2026-08-09 13:42 UTCGHSA enrichment
  25. 2026-08-09 02:04 UTCEG score recompute
  26. 2026-08-09 02:04 UTCGHSA enrichment
  27. 2026-08-08 16:37 UTCEPSS rescore
  28. 2026-08-08 14:26 UTCGHSA enrichment
  29. 2026-08-08 02:47 UTCEG score recompute
  30. 2026-08-08 02:47 UTCGHSA enrichment
  31. 2026-08-07 15:08 UTCGHSA enrichment
  32. 2026-08-07 03:29 UTCGHSA enrichment
  33. 2026-08-06 15:50 UTCEG score recompute
  34. 2026-08-06 15:50 UTCGHSA enrichment
  35. 2026-08-06 13:46 UTCEPSS rescore
  36. 2026-08-06 04:10 UTCEG score recompute
  37. 2026-08-06 04:10 UTCGHSA enrichment
  38. 2026-08-05 19:17 UTCEPSS rescore
  39. 2026-08-05 16:31 UTCEG score recompute
  40. 2026-08-05 16:31 UTCGHSA enrichment
  41. 2026-08-05 15:26 UTCEG score recompute▲ 7.50
  42. 2026-08-05 15:26 UTCGHSA enrichment
  43. 2026-08-05 15:25 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  44. 2026-08-05 07:19 UTCNVD update
  45. 2026-08-05 06:20 UTCEG score recompute
  46. 2026-08-05 06:20 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16736?
CVE-2026-16736 is a high vulnerability published on August 5, 2026. The User Registration & Membership WordPress plugin before 5.2.6 does not enforce the site's registration-disabled setting when processing registration-form submissions, allowing unauthenticated users to create new accounts even when the administrator has turned off open registration.
When was CVE-2026-16736 disclosed?
CVE-2026-16736 was first published in the National Vulnerability Database on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16736 actively exploited?
CVE-2026-16736 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 77.7% of all scored CVEs.
What is the CVSS score of CVE-2026-16736?
CVE-2026-16736 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16736?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16736, 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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