Medium
docopt.cpp — security advisory
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).
- Products
- docopt.cpp
- Affected versions
- 0.6.2-2, 0.6.2-2.1, 0.6.2-2.3, 0.6.2-2.4, 0.6.2-2build1, 0.6.3-4, 0.6.3-4build1, 0.6.3-5, 0.6.3-5build1
- Fixed versions
- Not specified
- CVEs
- CVE-2025-67125
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:55 UTC · Revision 1
Source evidence
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).
osv:UBUNTU-CVE-2025-67125
docopt.cpp
Fixed versions: Not specified
docopt.cpp
Fixed versions: Not specified
docopt.cpp
Fixed versions: Not specified
docopt.cpp
Fixed versions: Not specified
docopt.cpp
Fixed versions: Not specified
docopt.cpp
Fixed versions: Not specified
docopt.cpp
Fixed versions: Not specified
Complete source record
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"modified": "2026-10-17T12:57:38.129961653Z",
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"references": [
"https://ubuntu.com/security/CVE-2025-67125",
"https://www.cve.org/CVERecord?id=CVE-2025-67125",
"https://gist.github.com/thesmartshadow/672afe8828844c833f46f8ebe2f5f3bd",
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"published_at": "2026-01-23T16:15:00+00:00"
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