Path Traversal in Coder Code-Marketplace
CVE-2026-35454
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Coder Code-Marketplace — versions < 2.4.2
Weakness classification (CWE)
References
- github.com/coder/code-marketplace/security/advisories/GHSA-8x9r-hvwg-c55h (Third Party Advisory)
- github.com/coder/code-marketplace/releases/tag/v2.4.2 (Release Notes)
Frequently asked questions
- What is CVE-2026-35454?
- CVE-2026-35454 is a medium-severity vulnerability in Coder Code-Marketplace, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-04-06.
- How severe is CVE-2026-35454?
- Medium severity. CVSS v3 base score is 6.5 out of 10.