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CVE-2026-111911

CVE-2026-111911

validatedZero produced an exploit or a check.

GHSA-768h-xwv2-fwp3 ↗EUVD-2026-103309 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−14dkevAttacks confirmed in the real world.
thorsten phpMyFAQ <=4.1.8
fixed in 4.1.9
CWE-287 Improper Authentication
ETK-2026-1907Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:composer/phpmyfaq/phpmyfaq
cvss9.3cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
+4h01mTTV
2h 21mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
public poc−14dtrigger signal (cve.org) +0dcheck available+0.2dagent stopped
−10d
−5d

description

phpMyFAQ 4.0.0 through 4.1.8 mishandles authentication during WebAuthn credential enrollment. A remote unauthenticated attacker may associate a credential with a targeted account and subsequently access that account, provided the attacker can target its username and the vulnerable registration functionality is exposed.

mitigation

Upgrade phpMyFAQ to version 4.1.9 or later. Until upgrades are complete, restrict access to WebAuthn registration endpoints and monitor for unexpected credential enrollments.

fixed in 4.1.9

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.42%35th percentile
agent run time
2h 21m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-17 18:46Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
−14d
Δ to kevAttacks confirmed in the real world.
–

outcome

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-03 11:38Z
  2. 2026-10-17 18:46Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-111911

this entry in the feed

GET /api/v1/feed/CVE-2026-111911

{
  "etk_id": "ETK-2026-1907",
  "cve_id": "CVE-2026-111911",
  "display_id": "CVE-2026-111911",
  "ghsa_id": "GHSA-768h-xwv2-fwp3",
  "euvd_id": "EUVD-2026-103309",
  "status": "published",
  "anchor_state": "anchored",
  "title": "WebAuthn registration authentication bypass in phpMyFAQ",
  "summary": "phpMyFAQ 4.0.0 through 4.1.8 mishandles authentication during WebAuthn credential enrollment. A remote unauthenticated attacker may associate a credential with a targeted account and subsequently access that account, provided the attacker can target its username and the vulnerable registration functionality is exposed.",
  "mitigation": "Upgrade phpMyFAQ to version 4.1.9 or later. Until upgrades are complete, restrict access to WebAuthn registration endpoints and monitor for unexpected credential enrollments.",
  "vendor": "thorsten",
  "product": "phpMyFAQ",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<=4.1.8"
      ],
      "ecosystem": "composer",
      "fixed_versions": [
        "4.1.9"
      ],
      "package_name": "phpmyfaq/phpmyfaq",
      "purl": "pkg:composer/phpmyfaq/phpmyfaq"
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0042,
  "epss_percentile": 0.3514,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 141.00496815,
  "t0_at": "2026-10-17T18:46:28.833000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-17T22:47:18.656757+00:00",
      "days": 0.16724333052083334,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T18:46:28.833000+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-03T11:38:28+00:00",
      "days": -14.297231863425926,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T18:46:28.833000+00:00",
      "url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-g6cq-6rqg-6c9p"
    },
    "trigger_signal": {
      "at": "2026-10-17T18:46:28.833000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T18:46:28.833000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-111911"
    }
  }
}

published 2026-10-17 20:26Z
last change 2026-10-21 05:31Z

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