{
  "schema_version": "1.5.0",
  "id": "CURL-CVE-2026-8458",
  "aliases": [
    "CVE-2026-8458"
  ],
  "summary": "wrong reuse for different services",
  "modified": "2026-06-24T10:06:45.00Z",
  "database_specific": {
    "package": "curl",
    "affects": "lib",
    "URL": "https://curl.se/docs/CVE-2026-8458.json",
    "www": "https://curl.se/docs/CVE-2026-8458.html",
    "issue": "https://hackerone.com/reports/3721183",
    "CWE": {
      "id": "CWE-488",
      "desc": "Exposure of Data Element to Wrong Session"
    },
    "last_affected": "8.20.0",
    "severity": "Low"
  },
  "published": "2026-06-24T08:00:00.00Z",
  "affected": [
    {
      "ranges": [
        {
           "type": "SEMVER",
           "events": [
             {"introduced": "7.43.0"},
             {"fixed": "8.21.0"}
           ]
        },
        {
           "type": "GIT",
           "repo": "https://github.com/curl/curl.git",
           "events": [
             {"introduced": "97c272e5d173ad5f706443e2477f0a84f0044edd"},
             {"fixed": "5e99b73cf441d9c369768b9cd48b5389b9a2503d"}
           ]
        }
      ],
      "versions": [
        "8.20.0", "8.19.0", "8.18.0", "8.17.0", "8.16.0", "8.15.0", "8.14.1", 
        "8.14.0", "8.13.0", "8.12.1", "8.12.0", "8.11.1", "8.11.0", "8.10.1", 
        "8.10.0", "8.9.1", "8.9.0", "8.8.0", "8.7.1", "8.7.0", "8.6.0", 
        "8.5.0", "8.4.0", "8.3.0", "8.2.1", "8.2.0", "8.1.2", "8.1.1", 
        "8.1.0", "8.0.1", "8.0.0", "7.88.1", "7.88.0", "7.87.0", "7.86.0", 
        "7.85.0", "7.84.0", "7.83.1", "7.83.0", "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"
      ]
    }
  ],
  "credits": [
    {
      "name": "Muhamad Arga Reksapati",
      "type": "FINDER"
    },
    {
      "name": "Stefan Eissing",
      "type": "REMEDIATION_DEVELOPER"
    }
  ],
  "details": "libcurl might in some circumstances reuse the wrong connection when asked to\ndo Negotiate-authenticated ones, even when they are set to use different\n\"services\".\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a request that was issued by an application could\nwrongfully reuse an existing connection to the same server that was\nauthenticated using different services."
}