CVE-2020-7666: Arbitrary File Write via Archive Extraction (Zip Slip)

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-09-01 · updated 2026-06-17
Weakness: CWE-22

Description

This affects all versions of package github.com/u-root/u-root/pkg/cpio. It is vulnerable to leading, non-leading relative path traversal attacks and symlink based (relative and absolute) path traversal attacks in cpio file extraction.

Affected products

github.com/u-root/u-root/pkg/tarutil: all versions

References

https://github.com/u-root/u-root/pull/1817
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMUROOTUROOTPKGCPIO-570440
https://github.com/u-root/u-root/pull/1817
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMUROOTUROOTPKGCPIO-570440

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