{
  "schema_version": "1.5.0",
  "id": "CURL-CVE-2022-27776",
  "aliases": [
    "CVE-2022-27776"
  ],
  "summary": "Auth/cookie leak on redirect",
  "modified": "2026-04-25T17:48:46.00Z",
  "database_specific": {
    "package": "curl",
    "affects": "both",
    "URL": "https://curl.se/docs/CVE-2022-27776.json",
    "www": "https://curl.se/docs/CVE-2022-27776.html",
    "issue": "https://hackerone.com/reports/1547048",
    "CWE": {
      "id": "CWE-522",
      "desc": "Insufficiently Protected Credentials"
    },
    "award": {
      "amount": "480",
      "currency": "USD"
    },
    "last_affected": "7.82.0",
    "severity": "Low"
  },
  "published": "2022-04-27T08:00:00.00Z",
  "affected": [
    {
      "ranges": [
        {
           "type": "SEMVER",
           "events": [
             {"introduced": "4.9"},
             {"fixed": "7.83.0"}
           ]
        },
        {
           "type": "GIT",
           "repo": "https://github.com/curl/curl.git",
           "events": [
             {"introduced": "ae1912cb0d494b48d514d937826c9fe83ec96c4d"},
             {"fixed": "6e659993952aa5f90f48864be84a1bbb047fc258"}
           ]
        }
      ],
      "versions": [
        "7.82.0", "7.81.0", "7.80.0", "7.79.1", "7.79.0", "7.78.0", "7.77.0", 
        "7.76.1", "7.76.0", "7.75.0", "7.74.0", "7.73.0", "7.72.0", "7.71.1", 
        "7.71.0", "7.70.0", "7.69.1", "7.69.0", "7.68.0", "7.67.0", "7.66.0", 
        "7.65.3", "7.65.2", "7.65.1", "7.65.0", "7.64.1", "7.64.0", "7.63.0", 
        "7.62.0", "7.61.1", "7.61.0", "7.60.0", "7.59.0", "7.58.0", "7.57.0", 
        "7.56.1", "7.56.0", "7.55.1", "7.55.0", "7.54.1", "7.54.0", "7.53.1", 
        "7.53.0", "7.52.1", "7.52.0", "7.51.0", "7.50.3", "7.50.2", "7.50.1", 
        "7.50.0", "7.49.1", "7.49.0", "7.48.0", "7.47.1", "7.47.0", "7.46.0", 
        "7.45.0", "7.44.0", "7.43.0", "7.42.1", "7.42.0", "7.41.0", "7.40.0", 
        "7.39.0", "7.38.0", "7.37.1", "7.37.0", "7.36.0", "7.35.0", "7.34.0", 
        "7.33.0", "7.32.0", "7.31.0", "7.30.0", "7.29.0", "7.28.1", "7.28.0", 
        "7.27.0", "7.26.0", "7.25.0", "7.24.0", "7.23.1", "7.23.0", "7.22.0", 
        "7.21.7", "7.21.6", "7.21.5", "7.21.4", "7.21.3", "7.21.2", "7.21.1", 
        "7.21.0", "7.20.1", "7.20.0", "7.19.7", "7.19.6", "7.19.5", "7.19.4", 
        "7.19.3", "7.19.2", "7.19.1", "7.19.0", "7.18.2", "7.18.1", "7.18.0", 
        "7.17.1", "7.17.0", "7.16.4", "7.16.3", "7.16.2", "7.16.1", "7.16.0", 
        "7.15.5", "7.15.4", "7.15.3", "7.15.2", "7.15.1", "7.15.0", "7.14.1", 
        "7.14.0", "7.13.2", "7.13.1", "7.13.0", "7.12.3", "7.12.2", "7.12.1", 
        "7.12.0", "7.11.2", "7.11.1", "7.11.0", "7.10.8", "7.10.7", "7.10.6", 
        "7.10.5", "7.10.4", "7.10.3", "7.10.2", "7.10.1", "7.10", "7.9.8", 
        "7.9.7", "7.9.6", "7.9.5", "7.9.4", "7.9.3", "7.9.2", "7.9.1", 
        "7.9", "7.8.1", "7.8", "7.7.3", "7.7.2", "7.7.1", "7.7", 
        "7.6.1", "7.6", "7.5.2", "7.5.1", "7.5", "7.4.2", "7.4.1", 
        "7.4", "7.3", "7.2.1", "7.2", "7.1.1", "7.1", "6.5.2", 
        "6.5.1", "6.5", "6.4", "6.3.1", "6.3", "6.2", "6.1", 
        "6.0", "5.11", "5.10", "5.9.1", "5.9", "5.8", "5.7.1", 
        "5.7", "5.5.1", "5.5", "5.4", "5.3", "5.2.1", "5.2", 
        "5.0", "4.10", "4.9"
      ]
    }
  ],
  "credits": [
    {
      "name": "Harry Sintonen",
      "type": "FINDER"
    },
    {
      "name": "Daniel Stenberg",
      "type": "REMEDIATION_DEVELOPER"
    }
  ],
  "details": "curl might leak authentication or cookie header data on HTTP redirects to the\nsame host but another port number.\n\nWhen asked to send custom headers or cookies in its HTTP requests, curl sends\nthat set of headers only to the host which name is used in the initial URL, so\nthat redirects to other hosts make curl send the data to those. However, due\nto a flawed check, curl wrongly also sends that same set of headers to the\nhosts that are identical to the first one but use a different port number or\nURL scheme. Contrary to expectation and intention.\n\nSending the same set of headers to a server on a different port number is a\nproblem for applications that pass on custom `Authorization:` or `Cookie:`\nheaders, as those headers often contain privacy sensitive information or data.\n\ncurl and libcurl have options that allow users to opt out from this check, but\nthat is not set by default."
}