CVE-2021-22902
CVSS v3
7.5
HIGH
EPSS Score
2.9 %
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 6.1.0 · fixed in 6.1.3.2
Vendor advisories
rails: Possible Denial of Service vulnerability in Action Dispatch
Red Hat Security Advisory: Satellite 6.10 Release
Description
The actionpack ruby gem (a framework for handling and responding to web requests in Rails) before 6.0.3.7, 6.1.3.2 suffers from a possible denial of service vulnerability in the Mime type parser of Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.
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.