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Uncontrolled Resource Consumption

CVE-2026-84304

High
8.7/10

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, "internal/transport/transport.go" stores each fragmented HTTP/2 DATA frame as a separate "recvMsg" in "recvBuffer", so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with "GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION". This issue is fixed in version 1.83.1.

  • LOW
  • NETWORK
  • NONE
  • NONE

CWE-400 - Uncontrolled resource consumption

An uncontrolled resource allocation attack (also known as resource exhaustion attack) triggers unauthorized overconsumption of the limited resources in an application, such as memory, file system storage, database connection pool entries, and CPU. This may lead to denial of service for valid users and degradation of the application's functionality as well as that of the host operating system.

References

Advisory Timeline

  • Published