UpHeron
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Servers and applications

CVE-2024-23323

Excessive CPU usage when URI template matcher is configured using regex

Severity
Medium 5.3
Published
9 Feb 2024
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.26.7, 1.27.3, 1.28.1, 1.29.1
Also known as
GHSA-x278-4w4x-r7ch
Sources
NVD, Project advisories (GitHub)

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 software

SoftwareAffected versions
EnvoyServers and applications · cpe:a:envoyproxy:envoy
  • From 1.26.0 before 1.26.7
  • From 1.27.0 before 1.27.3
  • From 1.28.0 before 1.28.1
  • From 1.29.0 before 1.29.1
EnvoyServers and applications · github:envoyproxy/envoy
  • Every version before 1.26.7

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2024-23323
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2024-23323
  • GitHub Advisory Database https://github.com/advisories/GHSA-x278-4w4x-r7ch
  • github.com https://github.com/envoyproxy/envoy/security/advisories/GHSA-x278-4w4x-r7ch