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CVE-2026-47207

Envoy crashes if multiple unexpected ext_proc responses are packed into one gRPC message PUBLISHED

Description (CNA)

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. This can occur when the first response in the batch causes the gRPC stream object to be destroyed, leading to a use-after-free error when Envoy attempts to process subsequent responses in the same gRPC message. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.

Affected (CNA)

Vendor / productVersions
envoyproxy / envoyaffected >= 1.38.0, < 1.38.3; affected >= 1.37.0, < 1.37.5; affected >= 1.36.0, < 1.36.9; affected >= 1.34.0, < 1.35.13

CWE

CWE-416

References

ADP enrichment

CISA-ADP

No English description supplied.