CVE-2020-7668

Arbitrary File Write via Archive Extraction (Zip Slip)

7.5 HighFix available

In all versions of the package github.com/unknwon/cae/tz, the ExtractTo function doesn't securely escape file paths in zip archives which include leading or non-leading "..". This allows an attacker to add or replace files system-wide.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

1.36%Up 0.9 points since Apr 14, 2021

What each source reports

CVE List Score used 7.5

Arbitrary File Write via Archive Extraction (Zip Slip)

Record: CVE-2020-7668
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:U/RC:C
Updated: 2026-11-02

EUVDEUVD-2021-1013 7.5

Record: EUVD-2021-1013
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:U/RC:C
Updated: 2026-11-03

GitHub AdvisoriesGHSA-88jf-7rch-32qc 7.5

github.com/unknwon/cae Path Traversal vulnerability

The ExtractTo function doesn't securely escape file paths in zip archives which include leading or non-leading "..". This allows an attacker to add or replace files system-wide.

Record: GHSA-88jf-7rch-32qc
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

NVD 7.5

Record: CVE-2020-7668
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness: CWE-22
Updated: 2026-11-02

OSVGHSA-88jf-7rch-32qc 7.5

github.com/unknwon/cae Path Traversal vulnerability

The ExtractTo function doesn't securely escape file paths in zip archives which include leading or non-leading "..". This allows an attacker to add or replace files system-wide.

Record: GHSA-88jf-7rch-32qc
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-7668 7.5

Record: UBUNTU-CVE-2020-7668
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVGO-2020-0041 No score

Path Traversal in github.com/unknwon/cae

Due to improper path sanitization, archives containing relative file paths can cause files to be written (or overwritten) outside of the target directory.

Record: GO-2020-0041
Updated: 2026-11-02

Affected products

compression and archive extensions tz project and archive extensions tz project

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/unknwon/cae` Go	before 1.0.1	1.0.1
`golang-github-unknwon-cae` Ubuntu:18.04:LTS	All versions, plus listed versions 0.0~git20160715.0.c6aac99-10.0~git20160715.0.c6aac99-20.0~git20160715.0.c6aac99-4	None known
`golang-github-unknwon-cae` Ubuntu:20.04:LTS	All versions, plus listed versions 0.0~git20160715.0.c6aac99-4	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-7668 is a high vulnerability (CVSS 7.5) in Compression And Archive Extensions Tz Project And Archive Extensions Tz Project, published June 17, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.36%, the 71st percentile. Fixed in github.com/unknwon/cae 1.0.1.