# CVE-2024-23323

## Summary

- **CVE ID:** CVE-2024-23323
- **Severity:** MEDIUM
- **CVSS Score:** 4.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
- **CWE:** CWE-400, CWE-1176
- **Published:** Feb 9, 2024
- **Last Modified:** Mar 13, 2026

## Description

Envoy is a high-performance edge/middle/service proxy. The regex expression is compiled for every request and can result in high CPU usage and increased request latency when multiple routes are configured with such matchers. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## Affected Products

- envoyproxy — envoy (>= 1.29.0, < 1.29.1)
- envoyproxy — envoy (>= 1.28.0, < 1.28.1)
- envoyproxy — envoy (>= 1.27.0, < 1.27.3)
- envoyproxy — envoy (< 1.26.7)

## References

- [CNA](https://github.com/envoyproxy/envoy/security/advisories/GHSA-x278-4w4x-r7ch)
- [CNA](https://github.com/envoyproxy/envoy/commit/71eeee8f0f0132f39e402b0ee23b361ee2f4e645)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.50%
- **EPSS Percentile:** 41.5

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