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CVE-2026-56434 NGINX ngx_http_ssi_module vulnerability

🗓️ 15 Jul 2026 14:33:46Reported by f5Type 
cvelist
 cvelist
🔗 www.cve.org👁 48 Views

Unauthenticated MITM causes heap overread via SSI with SSI and proxy_pass and proxy_buffering off.

Related
Affected
Refs
[
  {
    "vendor": "F5",
    "product": "NGINX Plus",
    "modules": [
      "ngx_http_ssi_module"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "37.0.0.1",
        "lessThan": "37.0.3.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R36",
        "lessThan": "R36 P7",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R33",
        "lessThan": "*",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  },
  {
    "vendor": "F5",
    "product": "NGINX Open Source",
    "modules": [
      "ngx_http_ssi_module"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "1.31.2",
        "lessThan": "1.31.3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "0.8.11",
        "lessThan": "1.30.4",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]

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