CVE-2026-124679

{
  "etk_id": "ETK-2026-4414",
  "cve_id": "CVE-2026-124679",
  "display_id": "CVE-2026-124679",
  "ghsa_id": "GHSA-mgfp-w5j2-wv57",
  "euvd_id": "EUVD-2026-125682",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Header spoofing authentication bypass in Apache APISIX",
  "summary": "Apache APISIX 3.18.0 through 3.19.0 can treat client-controlled header data as trusted authentication information on certain routes. An unauthenticated client may bypass access controls when non-strict JWE decryption uses different input and forwarded headers, or when forward-auth degradation is enabled while its authentication service is unavailable.",
  "mitigation": "Upgrade Apache APISIX to version 3.20.0. Until upgraded, enforce strict JWE validation, avoid differing token and forwarded headers, and disable forward-auth degradation where feasible.",
  "vendor": "Apache Software Foundation",
  "product": "Apache APISIX",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.18.0, <= 3.19.0"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Apache APISIX",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 10.514974866666666,
  "t0_at": "2026-11-13T17:53:07.017000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-13T17:53:07.017000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T17:53:07.017000+00:00",
      "url": "https://github.com/advisories/GHSA-mgfp-w5j2-wv57"
    }
  }
}