Path Traversal in github.com/coder/code-marketplace (CVE-2026-35454)
Summary
Path traversal in github.com/coder/code-marketplace (CVE-2026-35454). Data can be tampered with by attackers. Exploitable via ExtractZip. Mitigation: upgrade to 1.2.3-0.20260402184705-988440dee05f or later.
Original description
The description as published by the source.
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.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-35454 has been found in github.com/coder/code-marketplace.
Attackers can target a specific entry point like ExtractZip over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 6.5/10.
What to do: upgrade github.com/coder/code-marketplace to 1.2.3-0.20260402184705-988440dee05f or later.
If unsure, ask your IT team or search "github.com/coder/code-marketplace CVE-2026-35454" on the vendor's site.
CVE-2026-35454 (github.com/coder/code-marketplace) — CWE-22 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: ExtractZip / filepath.Join / zf.Name / AddExtension
Patched: 1.2.3-0.20260402184705-988440dee05f — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Path traversal (CWE-22) exists in github.com/coder/code-marketplace. Attackers reach the vulnerable code path via ExtractZip.
Check the vendor advisory for the affected versions of github.com/coder/code-marketplace. Attack surface: ExtractZip / filepath.Join / zf.Name / AddExtension.
Severity: Medium (CVSS 6.5/10). Data can be tampered with by attackers.
Update to 1.2.3-0.20260402184705-988440dee05f.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/coder/code-marketplace' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/coder/code-marketplace' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/coder/code-marketplaceを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade github.com/coder/code-marketplace to 1.2.3-0.20260402184705-988440dee05fステージング環境で 1.2.3-0.20260402184705-988440dee05f に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com
- web github.com