400 1176
Advisory Published

CVE-2024-23323: Excessive CPU usage when URI template matcher is configured using regex in Envoy

First published: Fri Feb 09 2024(Updated: )

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 SoftwareAffected VersionHow to fix
Envoyproxy Envoy>=1.26.0<1.26.7
Envoyproxy Envoy>=1.27.0<1.27.3
Envoyproxy Envoy>=1.28.0<1.28.1
Envoyproxy Envoy>=1.29.0<1.29.1

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