Critical
Security advisory
Faye (NPM, RubyGem) versions greater than 0.5.0 and before 1.0.4, 1.1.3 and 1.2.5, has the potential for authentication bypass in the extension system. The vulnerability allows any client to bypass checks put in place by server-side extensions, by appending extra segments to the message channel. It is patched in versions 1.0.4, 1.1.3 and 1.2.5.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-11020
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 10:42 UTC · Revision 1
Source evidence
Faye (NPM, RubyGem) versions greater than 0.5.0 and before 1.0.4, 1.1.3 and 1.2.5, has the potential for authentication bypass in the extension system. The vulnerability allows any client to bypass checks put in place by server-side extensions, by appending extra segments to the message channel. It is patched in versions 1.0.4, 1.1.3 and 1.2.5.
osv:CVE-2020-11020
Complete source record
{
"id": "2732bea3ab230cdae62f56f12fc3faf589902050ba7bbc3b60a2d6d5c2075b81",
"url": "https://osv.dev/vulnerability/CVE-2020-11020",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-11020",
"summary": "Faye (NPM, RubyGem) versions greater than 0.5.0 and before 1.0.4, 1.1.3 and 1.2.5, has the potential for authentication bypass in the extension system. The vulnerability allows any client to bypass checks put in place by server-side extensions, by appending extra segments to the message channel. It is patched in versions 1.0.4, 1.1.3 and 1.2.5.",
"evidence": "osv:CVE-2020-11020",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2020-11020",
"aliases": [
"CVE-2020-11020",
"GHSA-qpg4-4w7w-2mq5"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/faye/faye",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "72a8dac064824fce0cd3558117e1e6402ce0464b"
},
{
"introduced": "020cf7ca9071c2a4d9c54f1676449de7a4a2069d"
},
{
"fixed": "294f0852e49afde57a1330d0fa26e445e02342f9"
},
{
"introduced": "216ea3333d7bc0fd7f6c6d25e6eb0815b259ec73"
},
{
"fixed": "e459ff1c5c30ce776d1c5747e5f641f081d3a436"
},
{
"fixed": "65d297d341b607f3cb0b5fa6021a625a991cc30e"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:faye_project:faye:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.0.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:faye_project:faye:*:*:*:*:*:ruby:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.0.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:faye_project:faye:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "1.1.0"
},
{
"fixed": "1.1.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:faye_project:faye:*:*:*:*:*:ruby:*:*",
"range": [
{
"introduced": "1.1.0"
},
{
"fixed": "1.1.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:faye_project:faye:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "1.2.0"
},
{
"fixed": "1.2.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:faye_project:faye:*:*:*:*:*:ruby:*:*",
"range": [
{
"introduced": "1.2.0"
},
{
"fixed": "1.2.5"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "65d297d341b607f3cb0b5fa6021a625a991cc30e"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"1.1.2",
"1.2.4",
"1.2.3",
"1.2.2",
"1.2.1",
"1.2.0",
"1.1.1",
"1.1.0",
"1.0.3",
"1.0.2",
"1.0.1",
"1.0.0",
"0.8.9",
"0.8.6",
"0.8.5",
"0.8.4",
"0.8.2",
"0.8.1",
"0.8.0",
"0.7.0",
"0.6.4",
"0.6.3",
"0.6.2",
"0.6.1",
"0.6.0",
"0.5.4",
"0.5.3",
"0.5.2",
"0.5.1",
"0.5.0",
"0.3.3",
"0.3.2",
"0.3.1",
"0.3.0",
"0.2.2",
"0.2.1",
"0.2.0",
"0.1.1",
"0.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11020.json"
}
}
],
"modified": "2026-10-20T10:51:12.069560818Z",
"provider": "osv",
"references": [
"https://github.com/faye/faye/commit/65d297d341b607f3cb0b5fa6021a625a991cc30e",
"https://github.com/faye/faye/security/advisories/GHSA-qpg4-4w7w-2mq5"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-11020",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 382498,
"published_at": "2020-04-29T18:15:13.36+00:00"
}