CVE-2021-22904
CVSS v3
7.5
HIGH
EPSS Score
4.9 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- actionpackRubyGemsfrom 4.0.0 · fixed in 5.2.4.6
Vendor advisories
rails: Possible DoS Vulnerability in Action Controller Token Authentication
cfme-gemset as a component of CloudForms Management Engine 5 · cfme-gemset.src as a component of CloudForms Management Engine 5 · system as a component of Red Hat 3scale API Management Platform 2
Red Hat Security Advisory: Satellite 6.10 Release
Description
The actionpack ruby gem before 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 suffers from a possible denial of service vulnerability in the Token Authentication logic in Action Controller due to a too permissive regular expression. Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication.
Technical details
- Published
- 2021-06-11
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.