Vulnerability · Published Apr 6, 2026 · Assigned by GitHub_M

CVE-2026-35454Code Extension Marketplace has a Zip Slip Path Traversal

High 8.7

In plain English

A high-severity path traversal in code-marketplace from coder. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.3%top 71.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Code Extension Marketplace is an open-source alternative to the VS Code Marketplace. Prior to 2.4.2, Zip Slip vulnerability in coder/code-marketplace allowed a malicious VSIX file to write arbitrary files outside the extension directory. ExtractZip passed raw zip entry names to a callback that wrote files via filepath.Join with no boundary check; filepath.Join resolved .. components but did not prevent the result from escaping the base path. This vulnerability is fixed in 2.4.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/coder/code-marketplace	1.2.3-0.20260402184705-988440dee05f	GHSA-8x9r-hvwg-c55h
Go	github.com/coder/code-marketplace	1.2.3-0.20260402184705-988440dee05f	GO-2026-5270

Affected products (as reported)

Vendor	Product	Versions
coder	code-marketplace	< 2.4.2

Weakness: CWE-22 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/coder/code-marketplace/security/advisories/GHSA-8x9r-hvwg-c55h x_refsource_CONFIRM
https://github.com/coder/code-marketplace/releases/tag/v2.4.2 x_refsource_MISC