A regular expression based DoS vulnerability in Action Dispatch <6.0.6.1,< 6.1.7.1, and <7.0.4.1. Specially crafted cookies, in combination with a specially crafted X_FORWARDED_HOST header can cause the regular expression engine to enter a state of catastrophic backtracking. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| actionpack(RubyGems) | 3.0.0 | 5.2.8.15 | N/A |
| actionpack(RubyGems) | 6.0.0 | 6.1.7.1 | N/A |
| actionpack(RubyGems) | 7.0.0 | 7.0.4.1 | N/A |
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