How severe is GHSA-8x9r-hvwg-c55h?

No CVSS score has been assigned to GHSA-8x9r-hvwg-c55h yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-8x9r-hvwg-c55h?

GHSA-8x9r-hvwg-c55h affects the following packages: github.com/coder/code-marketplace (Go). Ecosystems affected: Go.

How do I fix GHSA-8x9r-hvwg-c55h?

Update github.com/coder/code-marketplace to 1.2.3-0.20260402184705-988440dee05f or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8x9r-hvwg-c55h is resolved across your whole dependency graph.

How do I detect GHSA-8x9r-hvwg-c55h in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/coder/code-marketplace. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-8x9r-hvwg-c55h if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-8x9r-hvwg-c55h?

O3 pinpoints whether GHSA-8x9r-hvwg-c55h is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-8x9r-hvwg-c55h actively exploited in the wild?

No public exploit code has been indexed for GHSA-8x9r-hvwg-c55h yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What type of vulnerability is GHSA-8x9r-hvwg-c55h?

GHSA-8x9r-hvwg-c55h is classified as Path Traversal (CWE-22). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-8x9r-hvwg-c55h published, and has it been updated?

GHSA-8x9r-hvwg-c55h was published on April 4, 2026 and was last updated on June 25, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

GHSA-8x9r-hvwg-c55h

Fix: coder/code-marketplace@988440d

GHSA-8x9r-hvwg-c55h is a Path Traversal vulnerability in github.com/coder/code-marketplace. O3 Security confirms whether GHSA-8x9r-hvwg-c55h is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Code Extension Marketplace: Zip Slip Path Traversal

Also known asCVE-2026-35454GO-2026-5270

Published

Apr 4, 2026

Updated

Jun 25, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Real-World Exposure

1 pkg affected

🐹github.com/coder/code-marketplace

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Zip Slip Path Traversal in coder/code-marketplace

Summary

A Zip Slip (CWE-22) vulnerability in coder/code-marketplace ≤ v2.4.1 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.

Root Cause

ExtractZip passed the raw, attacker-controlled zf.Name to a caller-supplied callback:

return false, fn(zf.Name, zr)  // zf.Name not sanitized

AddExtension constructed the output path with filepath.Join and no boundary check:

path := filepath.Join(dir, name)              // zip loop
path := filepath.Join(dir, file.RelativePath) // extra files loop

filepath.Clean resolved .. lexically but did not confine the result to dir:

filepath.Join("/srv/ext/pub/1.0", "../../../../etc/cron.d/evil")
  → "/etc/cron.d/evil"

Attack Scenario

An authenticated user (any upload-capable role) would submit a VSIX containing path-traversal entries.

On extraction, files would land at attacker-chosen paths writable by the marketplace process, enabling persistence (cron/init injection), SSH key injection, ld.so.preload hijacking, or binary overwrite depending on process privileges.

Fix

Addressed in https://github.com/coder/code-marketplace/releases/tag/v2.4.2

Recognition

Coder would like to thank Kandlaguduru Vamsi for responsibly disclosing this issue in accordance with https://coder.com/security/policy

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/coder/code-marketplace`	all versions	1.2.3-0.20260402184705-988440dee05f

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/coder/code-marketplace. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/coder/code-marketplace to 1.2.3-0.20260402184705-988440dee05f or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8x9r-hvwg-c55h is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-8x9r-hvwg-c55h is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-8x9r-hvwg-c55h. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

# Zip Slip Path Traversal in coder/code-marketplace ## Summary A Zip Slip (CWE-22) vulnerability in `coder/code-marketplace` ≤ v2.4.1 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. ## Root Cause `ExtractZip` passed the raw, attacker-controlled `zf.Name` to a caller-supplied callback: ```go return false, fn(zf.Name, zr) // zf.Name not

O3 Security · Impact-Aware SCA

Is GHSA-8x9r-hvwg-c55h in your dependencies?

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