CVE-2023-22796: Activesupport Project Activesupport

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

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.

Affected products

• Activesupport Project Activesupport: before 6.1.7.1 (fixed in 6.1.7.1); from 7.0.0, before 7.0.4.1 (fixed in 7.0.4.1)

Published 2023-02-09. Last modified 2026-06-17.