CVE-2026-73856

{
  "etk_id": "ETK-2026-3645",
  "cve_id": "CVE-2026-73856",
  "display_id": "CVE-2026-73856",
  "ghsa_id": "GHSA-vmg8-j66p-vgvw",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "anchored",
  "title": "Case-sensitive response inspection bypass in ModSecurity",
  "summary": "ModSecurity versions 3.0.0 through 3.0.16 can skip response-body inspection when a response media type uses casing that differs from configured values. An unauthenticated requester may receive content that phase-4 response rules would otherwise block, if response inspection relies on affected MIME-type matching.",
  "mitigation": "Upgrade ModSecurity to version 3.0.17. Prioritize systems that inspect response bodies for sensitive error or diagnostic content.",
  "vendor": "owasp-modsecurity",
  "product": "ModSecurity",
  "affected": [
    {
      "affected_notes": [
        "3.0.0 - 3.0.16"
      ],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [
        "3.0.17"
      ],
      "package_name": "libmodsecurity3",
      "purl": null
    }
  ],
  "cwes": [
    178
  ],
  "cvss_score": 8.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 31.4573967,
  "t0_at": "2026-11-05T15:50:09.778000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-09-30T07:31:00+00:00",
      "days": -36.34664094907407,
      "is_lower_bound": false,
      "measured_at": "2026-11-05T15:50:09.778000+00:00",
      "url": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw"
    },
    "trigger_signal": {
      "at": "2026-11-05T15:50:09.778000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-05T15:50:09.778000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-73856"
    }
  }
}