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CVE-2026-42055 NGINX ngx_http_proxy_v2_module and ngx_http_grpc_module vulnerability

🗓️ 17 Jun 2026 14:04:32Reported by f5Type 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

Remote attacker can cause heap overflow in NGINX via large headers with proxy_http_version 2 or grpc_pass when ignore_invalid_headers is off.

Related
Affected
Refs
[
  {
    "defaultStatus": "unknown",
    "modules": [
      "ngx_http_proxy_v2_module",
      "ngx_http_grpc_module"
    ],
    "product": "NGINX Open Source",
    "vendor": "F5",
    "versions": [
      {
        "lessThan": "1.31.2",
        "status": "affected",
        "version": "1.13.10",
        "versionType": "custom"
      },
      {
        "lessThan": "1.30.3",
        "status": "affected",
        "version": "1.30.2",
        "versionType": "custom"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "modules": [
      "ngx_http_proxy_v2_module",
      "ngx_http_grpc_module"
    ],
    "product": "NGINX Plus",
    "vendor": "F5",
    "versions": [
      {
        "lessThan": "37.0.2.1",
        "status": "affected",
        "version": "37.0",
        "versionType": "custom"
      },
      {
        "lessThan": "R36 P6",
        "status": "affected",
        "version": "R36",
        "versionType": "custom"
      }
    ]
  }
]

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