CVE-2020-36561 is a critical-severity (CVSS 9.1) Path Traversal vulnerability in github.com/yi-ge/unzip. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for github.com/yi-ge/unzip — see the affected versions and patch details below.
Unzip vulnerable to path traversal
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for CVE-2020-36561.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/yi-ge/unzipReal-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
Due to improper path sanitization, archives containing relative file paths can cause files to be written (or overwritten) outside of the target directory.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/yi-ge/unzip | all versions | 1.0.3-0.20200308084313-2adbaa4891b9go get github.com/yi-ge/unzip@v1.0.3-0.20200308084313-2adbaa4891b9 |
Affected Products
unzipunzip_projectResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/yi-ge/unzip, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/yi-ge/unzip to 1.0.3-0.20200308084313-2adbaa4891b9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-36561 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.
Frequently Asked Questions
Is CVE-2020-36561 in your dependencies?
Find it across Go, including transitive dependencies.