A signed integer overflow in docopt.cpp v0.6.2 (LeafPattern::match in docopt_private.h)...

Vulnerability Description

A signed integer overflow in docopt.cpp v0.6.2 (LeafPattern::match in docopt_private.h) when merging occurrence counters (e.g., default LONG_MAX + first user "-v/--verbose") can cause counter wrap (negative/unbounded semantics) and lead to logic/policy bypass in applications that rely on occurrence-based limits, rate-gating, or safety toggles. In hardened builds (e.g., UBSan or -ftrapv), the overflow may also result in process abort (DoS).

References

• https://gist.github.com/thesmartshadow/672afe8828844c833f46f8ebe2f5f3bd
• https://github.com/docopt/docopt.cpp