eef-cve-2026-113440

{
  "affected": [
    {
      "database_specific": {
        "source": "https://cna.erlef.org/osv/EEF-CVE-2026-113440.json"
      },
      "package": {
        "ecosystem": "Hex",
        "name": "hackney",
        "purl": "pkg:hex/hackney"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "4.9.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": [
        "2.0.0",
        "2.0.1",
        "3.0.0",
        "3.0.1",
        "3.0.2",
        "3.0.3",
        "3.1.0",
        "3.1.1",
        "3.1.2",
        "3.2.0",
        "3.2.1",
        "4.0.0",
        "4.0.1",
        "4.0.2",
        "4.0.3",
        "4.1.0",
        "4.2.0",
        "4.2.1",
        "4.2.2",
        "4.2.3",
        "4.3.0",
        "4.4.0",
        "4.4.1",
        "4.4.2",
        "4.4.3",
        "4.4.5",
        "4.5.0",
        "4.5.1",
        "4.5.2",
        "4.6.0",
        "4.6.1",
        "4.7.0",
        "4.7.1",
        "4.7.2",
        "4.7.3",
        "4.7.4",
        "4.8.0",
        "4.8.1",
        "4.8.2",
        "4.8.3",
        "4.8.4",
        "4.8.5",
        "4.8.6",
        "4.8.7"
      ]
    },
    {
      "database_specific": {
        "source": "https://cna.erlef.org/osv/EEF-CVE-2026-113440.json"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8f944559bdb83da60b5c06f6cf6d842591278364"
            },
            {
              "fixed": "6548384b22ea196023a1963e2967d5715b6d9564"
            }
          ],
          "repo": "https://github.com/benoitc/hackney",
          "type": "GIT"
        }
      ],
      "versions": [
        "4.8.6",
        "4.8.5",
        "4.8.4",
        "4.8.3",
        "4.8.2",
        "4.8.1",
        "4.8.0",
        "4.7.4",
        "4.7.3",
        "4.7.2",
        "4.7.1",
        "4.7.0",
        "4.6.1",
        "4.6.0",
        "4.5.2",
        "4.5.1",
        "4.5.0",
        "4.4.5",
        "4.4.4",
        "4.4.3",
        "4.4.2",
        "4.4.1",
        "4.4.0",
        "4.3.0",
        "4.2.3",
        "4.2.2",
        "4.2.1",
        "4.2.0",
        "4.1.0",
        "4.0.3",
        "4.0.2",
        "4.0.1",
        "4.0.0",
        "3.2.1",
        "3.2.0",
        "3.1.2",
        "3.1.1",
        "3.1.0",
        "3.0.3",
        "3.0.2",
        "3.0.1",
        "2.0.1",
        "2.0.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-113440"
  ],
  "credits": [
    {
      "name": "Martin Karrer",
      "type": "FINDER"
    },
    {
      "name": "Martin Karrer",
      "type": "REMEDIATION_DEVELOPER"
    },
    {
      "name": "Benoit Chesneau",
      "type": "REMEDIATION_DEVELOPER"
    },
    {
      "name": "Jonatan Männchen / EEF",
      "type": "COORDINATOR"
    }
  ],
  "database_specific": {
    "capec_ids": [
      "CAPEC-102"
    ],
    "cpe_ids": [
      "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"
    ],
    "cwe_ids": [
      "CWE-522"
    ]
  },
  "details": "## Summary\n\nInsufficiently Protected Credentials vulnerability in `hackney` in benoitc hackney allows a redirecting server to obtain the `basic_auth` and `cookie` credentials of a request via a same-host redirect to another scheme or port. With `follow_redirect` enabled, `hackney:follow_redirect/10` in `src/hackney.erl` reissues the request to the `Location` target after `hackney:maybe_strip_auth_on_redirect/3`, which compared only the hostname of the current and the redirect URL. A redirect from `https` to `http` on the same host resent the `Authorization` and `Cookie` headers in cleartext, where an on-path attacker can read them, and a redirect to another port on the same host handed them to a different service. `location_trusted` forwards credentials to any target by design and is unchanged.\n\nThis issue affects hackney: from 2.0.0 before 4.9.0.\n\n## Details\n\n**1. Redirect handling.** With `follow_redirect` set, `hackney:request/5` hands a 3xx response to `hackney:follow_redirect/10` in `src/hackney.erl`, which resolves the `Location` header against the current URL and calls `hackney:request/5` again with the caller's options and an empty header list. HTTP/1.1 and HTTP/2 share this path.\n\n**2. Host-only comparison.** Before the new request, `hackney:maybe_strip_auth_on_redirect/3` removes the `basic_auth` and `cookie` options when the redirect leaves the current host, unless `location_trusted` is set. It compared `#hackney_url.host` of the two URLs.\n\n**3. Consequence.** A redirect that keeps the hostname but changes the scheme or the port passes the check, so the new request carries the same `Authorization` and `Cookie` headers. From `https` to `http` they travel in cleartext; to another port they reach a different service on the same host.\n\n## Impact\n\nA server that answers a credentialed request with a same-host redirect to plain HTTP exposes the client's `Authorization` and `Cookie` headers to anyone on the network path, and a redirect to another port delivers them to whatever service listens there. The captured values can be replayed against the original origin.\n\n## Workarounds\n\nDisable `follow_redirect` and handle the `Location` header in the application, or pass the credentials as explicit `Authorization` and `Cookie` request headers instead of the `basic_auth` and `cookie` options. `hackney:follow_redirect/10` issues the redirected request with an empty header list, so explicit headers reach the first server only.\n\n## Configurations\n\nThe request is made with `follow_redirect` enabled and the `basic_auth` or `cookie` option set, over HTTP/1.1 or HTTP/2, without `location_trusted`. Credentials passed as explicit request headers are not forwarded on redirects and are not affected.",
  "id": "EEF-CVE-2026-113440",
  "modified": "2026-10-26T14:00:06.507819004Z",
  "published": "2026-10-26T13:49:17.377Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/benoitc/hackney/pull/979"
    },
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-113440.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/benoitc/hackney/releases/tag/4.9.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/benoitc/hackney/commit/8f944559bdb83da60b5c06f6cf6d842591278364"
    },
    {
      "type": "FIX",
      "url": "https://github.com/benoitc/hackney/commit/6548384b22ea196023a1963e2967d5715b6d9564"
    },
    {
      "type": "PACKAGE",
      "url": "https://hex.pm/packages/hackney"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "HTTP/1.1 and HTTP/2 redirects resend basic_auth and cookie to a different scheme or port in hackney"
}