A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1. A specially crafted string passed to the underscore method 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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| activesupport(RubyGems) | 0 | 6.1.7.1 | N/A |
| activesupport(RubyGems) | 7.0.0 | 7.0.4.1 | N/A |
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