UpHeron
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Servers and applications

CVE-2024-23326

Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230#section-6.7 a server sends 101 when switching protocols. Envoy incorrectly accepts a 200 response from a server when requesting a protocol upgrade,…

Severity
High 8.2
Published
4 Jun 2024
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.27.6, 1.28.4, 1.29.5, 1.30.2
Sources
NVD

Affected software

SoftwareAffected versions
EnvoyServers and applications · cpe:a:envoyproxy:envoy
  • Every version before 1.27.6
  • From 1.28.0 before 1.28.4
  • From 1.29.0 before 1.29.5
  • From 1.30.0 before 1.30.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2024-23326
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2024-23326