{
"id": "GHSA-jp5v-5gx4-jmj9",
"aliases": [
"CVE-2020-8166"
],
"details": "It is possible to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token for any action for that session.\n\nImpact\n------\n\nGiven the ability to extract the global CSRF token, an attacker would be able to construct a per-form CSRF token for that session.\n\nWorkarounds\n-----------\n\nThis is a low-severity security issue. As such, no workaround is necessarily until such time as the application can be upgraded.",
"summary": "Ability to forge per-form CSRF tokens in Rails",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.2.4.3"
}
]
}
],
"package": {
"name": "actionpack",
"ecosystem": "RubyGems"
},
"database_specific": {
"last_known_affected_version_range": "<= 5.2.4.2"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.0.3.1"
}
]
}
],
"package": {
"name": "actionpack",
"ecosystem": "RubyGems"
},
"database_specific": {
"last_known_affected_version_range": "<= 6.0.3"
}
}
],
"modified": "2026-05-05T22:16:48Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
}
],
"published": "2020-05-26T15:11:13Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8166",
"type": "ADVISORY"
},
{
"url": "https://hackerone.com/reports/732415",
"type": "WEB"
},
{
"url": "https://github.com/rails/rails",
"type": "PACKAGE"
},
{
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2020-8166.yml",
"type": "WEB"
},
{
"url": "https://groups.google.com/forum/#!topic/rubyonrails-security/NOjKiGeXUgw",
"type": "WEB"
},
{
"url": "https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw",
"type": "WEB"
},
{
"url": "https://www.debian.org/security/2020/dsa-4766",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2020-07-02T19:15:12Z",
"github_reviewed_at": "2020-05-26T15:10:56Z"
}
}