High
Security advisory
In Symfony before versions 4.4.13 and 5.1.5, the 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. This has been fixed in versions 4.4.13 and 5.1.5.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-15094
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:38 UTC · Revision 1
Source evidence
In Symfony before versions 4.4.13 and 5.1.5, the 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. This has been fixed in versions 4.4.13 and 5.1.5.
osv:CVE-2020-15094
Complete source record
{
"id": "8e30e6bfc01ab9d22148c7d852be77716895a0889f8c4f126428b12b024864bf",
"url": "https://osv.dev/vulnerability/CVE-2020-15094",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-15094",
"summary": "In Symfony before versions 4.4.13 and 5.1.5, the 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. This has been fixed in versions 4.4.13 and 5.1.5.",
"evidence": "osv:CVE-2020-15094",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2020-15094",
"aliases": [
"BIT-symfony-2020-15094",
"CVE-2020-15094",
"GHSA-754h-5r27-7x3r"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/symfony/http-client",
"type": "GIT",
"events": [
{
"introduced": "233f73babb157deac7289119aa3d0e871bac8def"
},
{
"fixed": "1d06c290f2875cc87ecf64ecd33e62f857530ce4"
},
{
"introduced": "63342eabdc6fc6c12e6b18506a207d16687aa33f"
},
{
"fixed": "21c4372e9cd2305313f4d4792d7b9fa7c25ade53"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:sensiolabs:httpclient:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.13"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:sensiolabs:httpclient:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.1.0"
},
{
"fixed": "5.1.5"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v5.1.4",
"v4.4.12",
"v5.1.3",
"v4.4.11",
"v5.1.2",
"v5.1.1",
"v4.4.10",
"v5.1.0",
"v4.4.9",
"v4.4.8",
"v4.4.7",
"v4.4.6",
"v4.4.5",
"v4.4.4",
"v4.4.3",
"v4.4.2",
"v4.4.1",
"v4.4.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15094.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/symfony/security-http",
"type": "GIT",
"events": [
{
"introduced": "e49361b75e9acbc029b35ae4ba957e712137286b"
},
{
"fixed": "473da00f1244ead079619628a3781622877efdd3"
},
{
"introduced": "6a785d9a0deeb401d7ae540fd0492aca4e6b894e"
},
{
"fixed": "7741021221548e2b5768ec0cf502c91b6c55b209"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.13"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.1.0"
},
{
"fixed": "5.1.5"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v5.1.3",
"v4.4.9",
"v4.4.11",
"v4.4.10",
"v5.1.2",
"v5.1.1",
"v5.1.0",
"v4.4.8",
"v4.4.7",
"v4.4.6",
"v4.4.5",
"v4.4.4",
"v4.4.3",
"v4.4.2",
"v4.4.1",
"v4.4.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15094.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/symfony/symfony",
"type": "GIT",
"events": [
{
"introduced": "625a4dbfdafcb8cea8ff90a62b9c24b28694938d"
},
{
"fixed": "9b8314080fb15e84e030f94488d9e1fa17adb846"
},
{
"introduced": "729e21c65356880bd9488588e726aa8735dcb52f"
},
{
"fixed": "31b6a95fc288617ccfa27aa819d30c0c2201416a"
},
{
"fixed": "d9910e0b33a2e0f993abff41c6fbc86951b66d78"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.13"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.1.0"
},
{
"fixed": "5.1.5"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "d9910e0b33a2e0f993abff41c6fbc86951b66d78"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v5.1.4",
"v4.4.12",
"v5.1.3",
"v4.4.11",
"v4.4.10",
"v5.1.2",
"v5.1.1",
"v5.1.0",
"v4.4.9",
"v4.4.8",
"v4.4.7",
"v4.4.6",
"v4.4.5",
"v4.4.4",
"v4.4.3",
"v4.4.2",
"v4.4.1",
"v4.4.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15094.json"
}
}
],
"modified": "2026-10-24T10:47:48.363394206Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC/",
"https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r",
"https://packagist.org/packages/symfony/http-kernel",
"https://packagist.org/packages/symfony/symfony",
"https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "32"
},
{
"last_affected": "32"
},
{
"introduced": "33"
},
{
"last_affected": "33"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-15094",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 441560,
"published_at": "2020-09-02T18:15:11.187+00:00"
}