CVE-2018-1002207 is a medium-severity (CVSS 5.5) Path Traversal vulnerability in github.com/mholt/archiver. 4 public exploit references exist, so weaponization risk is real. O3 Security confirms whether CVE-2018-1002207 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Arbitrary File Write via Archive Extraction in mholt/archiver
Real-World Exposure
github.com/mholt/archiverReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
mholt/archiver golang package before e4ef56d48eb029648b0e895bb0b6a393ef0829c3 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in an archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/mholt/archiver | all versions | 2.1.0 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
mholt/archiver golang package before e4ef56d48eb029648b0e895bb0b6a393ef0…
mholt/archiver golang package before e4ef56d48eb029648b0e895bb0b6a393ef0…
mholt/archiver golang package before e4ef56d48eb029648b0e895bb0b6a393ef0…
mholt/archiver golang package before e4ef56d48eb029648b0e895bb0b6a393ef0…
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/mholt/archiver. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/mholt/archiver to 2.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-1002207 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2018-1002207 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2018-1002207. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2018-1002207 in your dependencies?
O3 detects CVE-2018-1002207 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.