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GHSA-4QPP-GXM3-H9VW

Vulnerability from github – Published: 2025-12-11 15:30 – Updated: 2026-03-19 15:31
VLAI
Details

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.

Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2025-14523"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-11T13:15:58Z",
    "severity": "HIGH"
  },
  "details": "A flaw in libsoup\u2019s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.",
  "id": "GHSA-4qpp-gxm3-h9vw",
  "modified": "2026-03-19T15:31:10Z",
  "published": "2025-12-11T15:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-14523"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/472"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2421349"
    },
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      "url": "https://access.redhat.com/security/cve/CVE-2025-14523"
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  "schema_version": "1.4.0",
  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}



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