CVE-2020-7668: Path Traversal in github.com/unknwon/cae/tz
Summary
CVE-2020-7668: github.com/unknwon/cae Path Traversal vulnerability. Affects github.com/unknwon/cae versions < 1.0.1. Fixed in 1.0.1. How to fix ↓
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Background
The package github.com/unknwon/cae is a Go package that provides functionality for working with zip archives. It allows users to extract files from zip archives and includes features for securely handling file paths. However, a vulnerability has been discovered in the ExtractTo function of the package, which does not properly escape file paths in zip archives containing leading or non-leading "..". This can be exploited by an attacker to add or replace files system-wide.
Vulnerability Detail
The vulnerability (CVE-2020-7668) in github.com/unknwon/cae allows an attacker to perform path traversal attacks by manipulating file paths in zip archives. By including leading or non-leading ".." in the file paths, an attacker can bypass security measures and access files outside of the intended directory. This can lead to unauthorized access, information disclosure, or even remote code execution depending on the context in which the extracted files are used.
How To Fix
Latest published version: v1.0.2 as of 23 Oct 2026
go get github.com/unknwon/cae@v1.0.2Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.0.1
This is the first release that contains the fix.
go get github.com/unknwon/cae@v1.0.1Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is recommended to update to the latest version of the github.com/unknwon/cae package as soon as possible.
Conclusion
In conclusion, the github.com/unknwon/cae package is vulnerable to a path traversal attack that allows an attacker to access files outside of the intended directory. To mitigate this vulnerability, users should update to version 1.0.1 or later of the package. If you have any further questions or need assistance with vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for github.com/unknwon/cae →
FAQ
This vulnerability allows an attacker to access files outside of the intended directory, potentially leading to unauthorized access, information disclosure, or remote code execution.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Simply upload your Gopkg.lock file and the playground will analyze it for open-source vulnerabilities, including this one.
There are currently no known public exploits for this vulnerability. However, it is important to update to the latest version of the github.com/unknwon/cae package to mitigate the risk.
Yes, the CVSS score for this vulnerability is 7.5, indicating a high severity.
You can find more information about this vulnerability in the GitHub Advisory Database (https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/05/GHSA-88jf-7rch-32qc/GHSA-88jf-7rch-32qc.json).
Related vulnerabilities
Recent vulnerabilities recorded for github.com/unknwon/cae.
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