ReDoS
acronymweb devsecurityprogramming
Stands for: Regular expression Denial of Service
A denial-of-service caused by a regular expression that takes catastrophically long on certain input.
Some regex patterns backtrack exponentially on crafted strings, so a single request can pin a CPU, turning an innocent validation into a ReDoS vulnerability. The fix is safer patterns or a linear-time regex engine.
Also known as: redos, catastrophic backtracking