CVE-2026-86832

validatedZero produced an exploit or a check.

GHSA-5m3g-q793-wg8x ↗EUVD-2026-91939 ↗

check availableZero validated a working check for it.proven exploitableZero has validated a full working exploit.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
MetForm < 4.3.1
fixed in 4.3.1
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
ETK-2026-598, permanent identifier
+1.7dTTV
21mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal (cve.org) +0hcheck + exploit+40h58m
0
+12h
+24h
+36h

description

MetForm for WordPress versions before 4.3.1 insufficiently restrict access to form submission data through its REST API. An unauthenticated attacker may be able to view information submitted through forms without needing an account.

mitigation

Update the MetForm WordPress plugin to version 4.3.1 or later. Until updates are complete, restrict public access to the affected REST API endpoints where feasible.

fixed in 4.3.1

check
available
exploit
yes
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.
0.21%10th percentile
agent run time
21m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-03 06:00Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Differential: the exploit fired on the vulnerable build and stayed 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 06:00Z
    ghsa: trigger signal, started the run
  2. 2026-10-03 06:00Z

this entry in the feed

GET /api/v1/feed/CVE-2026-86832

{
  "etk_id": "ETK-2026-598",
  "cve_id": "CVE-2026-86832",
  "display_id": "CVE-2026-86832",
  "ghsa_id": "GHSA-5m3g-q793-wg8x",
  "euvd_id": "EUVD-2026-91939",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unauthenticated form submission data exposure in MetForm",
  "summary": "MetForm for WordPress versions before 4.3.1 insufficiently restrict access to form submission data through its REST API. An unauthenticated attacker may be able to view information submitted through forms without needing an account.",
  "mitigation": "Update the MetForm WordPress plugin to version 4.3.1 or later. Until updates are complete, restrict public access to the affected REST API endpoints where feasible.",
  "vendor": null,
  "product": "MetForm",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 4.3.1"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "4.3.1"
      ],
      "package_name": "MetForm",
      "purl": null
    }
  ],
  "cwes": [
    200
  ],
  "cvss_score": 5.3,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
  "epss_score": 0.0021,
  "epss_percentile": 0.1005,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": true,
  "pipeline_minutes": 21.383785133333333,
  "t0_at": "2026-10-03T06:00:26.051000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-04T22:58:03.930474+00:00",
      "days": 1.706688419837963,
      "is_lower_bound": false,
      "measured_at": "2026-10-03T06:00:26.051000+00:00",
      "url": null
    },
    "exploit": {
      "at": "2026-10-04T22:58:03.930474+00:00",
      "days": 1.706688419837963,
      "is_lower_bound": false,
      "measured_at": "2026-10-03T06:00:26.051000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-03T06:00:26.051000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-03T06:00:26.051000+00:00",
      "url": "https://github.com/advisories/GHSA-5m3g-q793-wg8x"
    }
  }
}

published 2026-10-04 22:36Z
last change 2026-10-21 04:45Z

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