data/osv/GO-2026-5346.json

{
  "schema_version": "1.3.1",
  "id": "GO-2026-5346",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2026-52845",
    "GHSA-f59h-q822-g45g"
  ],
  "summary": "Caddy: FastCGI header normalization bypass in forward_auth copy_headers in github.com/caddyserver/caddy",
  "details": "Caddy: FastCGI header normalization bypass in forward_auth copy_headers in github.com/caddyserver/caddy",
  "affected": [
    {
      "package": {
        "name": "github.com/caddyserver/caddy/v2",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.4"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy/fastcgi",
            "symbols": [
              "Transport.Provision",
              "Transport.RoundTrip",
              "Transport.UnmarshalCaddyfile",
              "client.Do",
              "client.Get",
              "client.Head",
              "client.Options",
              "client.Post",
              "client.PostFile",
              "client.PostForm",
              "client.Request",
              "clientCloser.Close",
              "record.Read",
              "streamReader.Read",
              "streamWriter.Flush",
              "streamWriter.FlushStream",
              "streamWriter.Write"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/caddyserver/caddy/security/advisories/GHSA-f59h-q822-g45g"
    },
    {
      "type": "FIX",
      "url": "https://github.com/caddyserver/caddy/pull/7633"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2026-5346",
    "review_status": "REVIEWED"
  }
}