# CVE-2023-44386

## Summary

- **CVE ID:** CVE-2023-44386
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
- **CWE:** CWE-231, CWE-617, CWE-696
- **Published:** Oct 5, 2023
- **Last Modified:** Mar 13, 2026

## Description

Vapor is an HTTP web framework for Swift. There is a denial of service vulnerability impacting all users of affected versions of Vapor. The HTTP1 error handler closed connections when HTTP parse errors occur instead of passing them on. The issue is fixed as of Vapor release 4.84.2.

## Affected Products

- vapor — vapor (>= 4.83.2, < 4.84.2)

## References

- [CNA](https://github.com/vapor/vapor/security/advisories/GHSA-3mwq-h3g6-ffhm)
- [CNA](https://github.com/vapor/vapor/commit/090464a654b03148b139a81f8f5ac63b0856f6f3)
- [CNA](https://github.com/vapor/vapor/releases/tag/4.84.2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.05%
- **EPSS Percentile:** 16.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._