UpHeron
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Servers and applications

CVE-2023-35945

HTTP/2 memory leak in nghttp2 codec

Severity
High 7.5
Published
12 Jul 2023
Last changed
15 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.23.11, 1.24.9, 1.25.8, 1.26.3
Also known as
GHSA-jfxv-29pc-x22r
Sources
NVD, Project advisories (GitHub)

Description

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving `RST_STREAM` immediately followed by the `GOAWAY` frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the `GOAWAY` frame skips de-allocation of the bookkeeping structure and pending compressed header. The…

Affected software

SoftwareAffected versions
EnvoyServers and applications · cpe:a:envoyproxy:envoy
  • Every version before 1.23.11
  • From 1.24.0 before 1.24.9
  • From 1.25.0 before 1.25.8
  • From 1.26.0 before 1.26.3
EnvoyServers and applications · github:envoyproxy/envoy
  • Every version before 1.23.11

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-35945
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-35945
  • GitHub Advisory Database https://github.com/advisories/GHSA-jfxv-29pc-x22r
  • github.com https://github.com/envoyproxy/envoy/security/advisories/GHSA-jfxv-29pc-x22r