CVE-2025-67125 Integer overflow in n/a
Signed integer overflow in docopt.cpp allows bypassing occurrence-based limits or causing denial of service via crafted verbose flags.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-67125?
CVE-2025-67125 is a medium-severity vulnerability in n/a, published on 23 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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).
Weakness: CWE-190
Which versions are affected by CVE-2025-67125?
It affects 1 product.
Products include Docopt Docopt.cpp.
How do I fix CVE-2025-67125?
No fix has been published for CVE-2025-67125 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-67125 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-67125 exists.
Sources
Also known as DEBIAN-CVE-2025-67125, GHSA-rjm3-mgvg-8w98, UBUNTU-CVE-2025-67125.