UpHeron
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Servers and applications

CVE-2023-27488

gRPC client produces invalid protobuf when an HTTP header with non-UTF8 value is received.

Severity
Critical 9.8
Published
4 Apr 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.22.9, 1.23.6, 1.24.4, 1.25.3
Also known as
GHSA-9g5w-hqr3-w2ph
Sources
NVD, Project advisories (GitHub)

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, escalation of privileges is possible when `failure_mode_allow: true` is configured for `ext_authz` filter. For affected components that are used for logging and/or visibility, requests may not be logged by the receiving service. When Envoy was…

Affected software

SoftwareAffected versions
EnvoyServers and applications · cpe:a:envoyproxy:envoy
  • Every version before 1.22.9
  • From 1.23.0 before 1.23.6
  • From 1.24.0 before 1.24.4
  • From 1.25.0 before 1.25.3
EnvoyServers and applications · github:envoyproxy/envoy
  • Every version before 1.22.9

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-27488
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-27488
  • GitHub Advisory Database https://github.com/advisories/GHSA-9g5w-hqr3-w2ph
  • github.com https://github.com/envoyproxy/envoy/security/advisories/GHSA-9g5w-hqr3-w2ph