CVE-2026-124432

HIGHPre-NVD 7.37.3
EchelonGraph scoreHIGH confidence

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

Score 7.3 from GitHub Security Advisory (severity: MODERATE) published 2026-11-08. A secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-119568 (ENISA EUVD) · GHSA-f46v-r9r2-mgmc (GitHub Security Advisories)Source: ENISA EUVD

7.3EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.3Exploit: No code on recordExposed 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 description, written by its CNA (VulnCheck), states the affected versions: "phpMyFAQ 4.1.9 before 4.1.11 and 4.2.0 pre-releases before 4.2.0-beta.3 contain an account enumeration vulnerability in the unauthenticated POST /api/webauthn/prepare-login endpoint, which returns stable stored credenti…" No release containing a fix is confirmed on record.

phpMyFAQ 4.1.9 before 4.1.11 and 4.2.0 pre-releases before 4.2.0-beta.3 contain an account enumeration vulnerability in the unauthenticated POST /api/webauthn/prepare-login endpoint, which returns stable stored credential IDs for passkey-registered accounts but an md5(time())-derived fallback ID otherwise. Unauthenticated attackers can compare allowCredentials IDs from requests sent more than one second apart, without rate limiting, to identify existing passkey-registered accounts and their credential IDs.

CVSS v3
7.3
EG Score
7.3HIGHhigh confidence
EG Risk
64
EG Risk 64/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity73% × 45%
Impact severity (EG Severity): CVSS 7.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.3): severity, escalated by confirmed exploitation. This CVE's 7.3 is its impact severity (EG Severity), not escalated.

EG Severity
7.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

November 8, 2026

Last Modified

November 9, 2026

Advisory Details (2)

Auto-updated Nov 8, 2026
🔬 Proof of concept available. No fix on record yet. Sources: github.
Web page

phpMyFAQ before 4.1.11 and 4.2.0-beta.3 Account Enumeration via WebAuthn prepare-login | Advisories | VulnCheck

https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.11-and-4.2.0-beta.3-account-enumeration-via-webauthn-prepare-login
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

phpMyFAQ WebAuthn prepare-login allows unauthenticated account/passkey enumeration via rotating vs stable credential IDs · Advisory · thorsten/phpMyFAQ · GitHub

https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-2rvx-pqfw-q35r

Vendor Advisories for CVE-2026-124432(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 12× in last 7d / 12× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-11-11 03:50 UTCEchelonGraph re-scored
  5. 2026-11-11 03:50 UTCGHSA enrichmentGHSA-f46v-r9r2-mgmc · GitHub severity MODERATE · GitHub CVSS 7.3
  6. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-11-09 15:27 UTCEchelonGraph re-scored
  9. 2026-11-09 15:27 UTCGHSA enrichmentGHSA-f46v-r9r2-mgmc · GitHub severity MODERATE · GitHub CVSS 7.3
  10. 2026-11-09 14:41 UTCEchelonGraph re-scored
  11. 2026-11-09 14:41 UTCGHSA enrichmentGHSA-f46v-r9r2-mgmc · GitHub severity MODERATE · GitHub CVSS 7.3
  12. 2026-11-09 14:35 UTCEchelonGraph re-scored
  13. 2026-11-09 14:35 UTCGHSA enrichmentGHSA-f46v-r9r2-mgmc · GitHub severity MODERATE · GitHub CVSS 7.3
  14. 2026-11-08 15:50 UTCEchelonGraph re-scored
  15. 2026-11-08 15:50 UTCGHSA enrichmentGHSA-f46v-r9r2-mgmc · GitHub severity MODERATE · GitHub CVSS 7.3
  16. 2026-11-08 14:27 UTCEchelonGraph re-scored
  17. 2026-11-08 14:05 UTCENISA EUVD ID recordedEUVD-2026-119568 · Source: ENISA EUVD
  18. 2026-11-08 13:26 UTCEchelonGraph re-scoredFirst assessed: 7.3 HIGH
  19. 2026-11-08 13:24 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-124432?
CVE-2026-124432 is a high-severity vulnerability; its CVE record was published on November 8, 2026. phpMyFAQ 4.1.9 before 4.1.11 and 4.2.0 pre-releases before 4.2.0-beta.3 contain an account enumeration vulnerability in the unauthenticated POST /api/webauthn/prepare-login endpoint, which returns stable stored credential IDs for passkey-registered accounts but an md5(time())-derived fallback ID…
When was CVE-2026-124432 made public?
CVE-2026-124432 was made public on October 23, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on November 8, 2026. EchelonGraph's copy of the record carries a last-modified date of November 9, 2026; the record at its source may have been updated since.
Is CVE-2026-124432 actively exploited?
CVE-2026-124432 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-124432?
CVE-2026-124432 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-124432?
No fix for CVE-2026-124432 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 description, written by its CNA (VulnCheck), states the affected versions: "phpMyFAQ 4.1.9 before 4.1.11 and 4.2.0 pre-releases before 4.2.0-beta.3 contain an account enumeration vulnerability in the unauthenticated POST /api/webauthn/prepare-login endpoint, which returns stable stored credenti…" No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-124432 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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