{
  "canonical_id": "symfony--CVE-2020-15094",
  "system_id": "symfony",
  "display_name": "Symfony",
  "category": "frameworks",
  "advisory_mode": "core",
  "title": "RCE in Symfony",
  "summary": "Description\n-----------\n\nThe `CachingHttpClient` class from the HttpClient Symfony component relies on the `HttpCache` class to handle requests. `HttpCache` uses internal headers like `X-Body-Eval` and `X-Body-File` to control the restoration of cached responses. The class was initially written with surrogate caching and ESI support in mind (all HTTP calls come from a trusted backend in that scenario). But when used by `CachingHttpClient` and if an attacker can control the response for a request being made by the `CachingHttpClient`, remote code execution is possible.\n\nResolution\n----------\n\nHTTP headers designed for internal use in `HttpCache` are now stripped from remote responses before being passed to `HttpCache`.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78) for the 4.4 branch.\n\nCredits\n-------\n\nI would like to thank Matthias Pigulla (webfactory GmbH) for reporting and fixing the issue.",
  "published_at": "2020-09-02T17:29:56Z",
  "updated_at": "2026-03-13T22:14:38.594283Z",
  "severity": "low",
  "cvss_score": 3.1,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r",
  "secondary_source_urls": [
    "https://nvd.nist.gov/vuln/detail/CVE-2020-15094",
    "https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78",
    "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2020-15094.yaml",
    "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-15094.yaml",
    "https://github.com/symfony/symfony",
    "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3",
    "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC",
    "https://packagist.org/packages/symfony/http-kernel",
    "https://packagist.org/packages/symfony/symfony",
    "https://symfony.com/cve-2020-15094"
  ],
  "aliases": [
    "BIT-symfony-2020-15094",
    "CVE-2020-15094",
    "GHSA-754h-5r27-7x3r"
  ],
  "cve_ids": [
    "CVE-2020-15094"
  ],
  "ghsa_ids": [
    "GHSA-754h-5r27-7x3r"
  ],
  "osv_ids": [
    "GHSA-754h-5r27-7x3r"
  ],
  "affected_versions": [
    "v4.3.0",
    "v4.3.1",
    "v4.3.10",
    "v4.3.11",
    "v4.3.2",
    "v4.3.3",
    "v4.3.4",
    "v4.3.5",
    "v4.3.6",
    "v4.3.7",
    "v4.3.8",
    "v4.3.9",
    "v4.4.0",
    "v4.4.0-BETA1",
    "v4.4.0-BETA2",
    "v4.4.0-RC1",
    "v4.4.1",
    "v4.4.10",
    "v4.4.11",
    "v4.4.12",
    "v5.0.0",
    "v5.0.1",
    "v5.0.10",
    "v5.0.11",
    "v5.0.2",
    "v5.0.3",
    "v5.0.4",
    "v5.0.5",
    "v5.0.6",
    "v5.0.7",
    "v5.0.8",
    "v5.0.9",
    "v5.1.0",
    "v5.1.0-BETA1",
    "v5.1.0-RC1",
    "v5.1.0-RC2",
    "v5.1.1",
    "v5.1.2",
    "v5.1.3",
    "v5.1.4",
    "introduced=4.3.0, fixed<4.4.13",
    "introduced=5.0.0, fixed<5.1.5"
  ],
  "fixed_versions": [
    "4.4.13",
    "5.1.5"
  ],
  "package_name": "symfony/symfony",
  "render_markdown": true,
  "case_path": "07-framework-security/frameworks/symfony/cases/symfony-cve-2020-15094.md",
  "secure_code_topics": [
    "xss-output-encoding",
    "authz-server-side-recheck",
    "path-traversal-guard"
  ],
  "status": "generated",
  "triage_reasons": [],
  "verification_status": "triage-manual",
  "verification_mode": "synthetic",
  "last_verified_at": null,
  "last_run_id": null,
  "evidence_bundle": null,
  "historical_status": null,
  "latest_status": null,
  "browser_evidence": {
    "required": false,
    "present": false,
    "refs": []
  },
  "repro_profile_id": "xss-generic",
  "artifact_mode": "synthetic",
  "blocked_reason": null,
  "metadata": {
    "source_names": [
      "OSV Symfony"
    ],
    "source_kinds": [
      "osv-batch"
    ],
    "candidate_count": 2
  }
}