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6.5 Medium

CVE-2024-39305 Envoy is a cloud-native, open source edge and service proxy

Description

Envoy is a cloud-native, open source edge and service proxy. Prior to versions 1.30.4, 1.29.7, 1.28.5, and 1.27.7. Envoy references already freed memory when route hash policy is configured with cookie attributes. Note that this vulnerability has been fixed in the open as the effect would be immediately apparent if it was configured. Memory allocated for holding attribute values is freed after configuration was parsed. During request processing Envoy will attempt to copy content of de-allocated memory into request cookie header. This can lead to arbitrary content of Envoy's memory to be sent to the upstream service or abnormal process termination. This vulnerability is fixed in Envoy versions v1.30.4, v1.29.7, v1.28.5, and v1.27.7. As a workaround, do not use cookie attributes in route action hash policy.

Affected products and versions

Product Affected versions Fixed in
envoy 1.30 1.30.0 → < 1.30.4 1.30.4
envoy 1.29 1.29.0 → < 1.29.7 1.29.7
envoy 1.28 1.28.0 → < 1.28.5 1.28.5
envoy 1.27 earliest → < 1.27.7 1.27.7

References

Timeline

  1. Published
  2. Last modified

Other CVEs of envoy

The 98 CVEs of envoy →
CVE-2026-73511 Envoy is an open source edge and service proxy designed for cloud-native applications 5.3 Medium CVE-2026-73553 Envoy is an open source edge and service proxy designed for cloud-native applications 7.5 High CVE-2026-73551 Envoy is an open source edge and service proxy designed for cloud-native applications 5.3 Medium CVE-2026-73546 Envoy is an open source edge and service proxy designed for cloud-native applications 7.4 High
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