CVE-2026-86407

LOWPre-NVD 3.73.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 3.7 from GitHub Security Advisory (severity: LOW) published 2026-09-13. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 3.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
3.7EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 3.7Exploit: None knownExposed services: Not assessed

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

The CVE record's CNA (WPScan) lists User Registration & Membership versions 5.0 up to but not including 5.2.8 as affected. No release containing a fix is confirmed on record.

The User Registration & Membership WordPress plugin before 5.2.8 does not verify that the visitor requesting its membership confirmation page owns the account named in the request, nor that any registration or purchase has taken place, allowing unauthenticated users to retrieve another user's email address, profile fields, role and membership order details. Exploitation requires the site owner to have added a user smart tag to that page's configurable message, which the shipped default does not contain.

CVSS v3
3.7
EG Score
3.7LOWmedium confidence
EG Risk
17
EG Risk 17/100

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 (value × EchelonGraph’s weight)
Severity37% × 45%
The EG Score, 3.7 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 13, 2026

Last Modified

September 14, 2026

References (1)

Vendor Advisories for CVE-2026-86407(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 15× in last 7d / 49× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 57 is merged into the row it repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-10-13 06:36 UTCEG score recompute
  3. 2026-10-13 06:35 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  5. 2026-10-12 14:51 UTCEG score recompute
  6. 2026-10-11 19:17 UTCEG score recompute
  7. 2026-10-11 16:33 UTCEG score recompute
  8. 2026-10-11 13:51 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  12. 2026-10-09 19:38 UTCEG score recompute
  13. 2026-10-09 19:38 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-10-06 16:50 UTCEG score recompute
  17. 2026-10-06 16:50 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  19. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  21. 2026-10-03 14:05 UTCEG score recompute
  22. 2026-10-03 14:05 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  24. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-09-30 11:04 UTCEG score recompute
Show 31 more
  1. 2026-09-30 11:04 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  2. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  4. 2026-09-27 08:19 UTCEG score recompute
  5. 2026-09-27 08:19 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  6. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  7. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-09-24 05:33 UTCEG score recompute
  9. 2026-09-24 05:33 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  10. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-09-21 02:48 UTCEG score recompute
  14. 2026-09-21 02:48 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  15. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-09-18 00:03 UTCEG score recompute
  18. 2026-09-18 00:03 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  19. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-09-14 21:17 UTCEG score recompute
  24. 2026-09-14 21:17 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g · GitHub severity LOW · GitHub CVSS 3.7
  25. 2026-09-13 11:21 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g
  26. 2026-09-13 10:50 UTCEG score recomputeFirst assessed: 3.7 LOW
  27. 2026-09-13 10:50 UTCGHSA enrichmentGHSA-wr2r-r9vc-rr7g
  28. 2026-09-13 10:49 UTCMITRE cvelistV5CVSS v3 → 3.7 · severity → LOW
  29. 2026-09-13 06:26 UTCNVD update
  30. 2026-09-13 06:06 UTCEG score recompute
  31. 2026-09-13 06:06 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86407?
CVE-2026-86407 is a low-severity vulnerability; its CVE record was published on September 13, 2026. The User Registration & Membership WordPress plugin before 5.2.8 does not verify that the visitor requesting its membership confirmation page owns the account named in the request, nor that any registration or purchase has taken place, allowing unauthenticated users to retrieve another user's email…
When was the CVE record for CVE-2026-86407 published?
The CVE record for CVE-2026-86407 was published on September 13, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 14, 2026; the record at its source may have been updated since.
Is CVE-2026-86407 actively exploited?
CVE-2026-86407 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-86407?
CVE-2026-86407 has a CVSS v3.1 base score of 3.7 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-86407?
No fix for CVE-2026-86407 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (WPScan) lists User Registration & Membership versions 5.0 up to but not including 5.2.8 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-86407 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-86407

Explore →

Is Your Infrastructure Affected by CVE-2026-86407?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs