---
id: CVE-2026-84304
title: gRPC-Go is the Go language implementation of gRPC
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…
severity: high
cwe:
  - CWE-400
vendor: grpc
product: google.golang.org/grpc
affected:
  - google.golang.org/grpc <= 1.83.0
patched:
  - google.golang.org/grpc 1.83.1
published: '2026-09-01'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84304'
references:
  - url: >-
      https://github.com/grpc/grpc-go/commit/7354d9c8debb4bcf2225bf429857078de310c176
    label: security-advisories@github.com
  - url: >-
      https://github.com/grpc/grpc-go/commit/8cfeca0e1ee5ea0980dcc320e20240fa1079ec77
    label: security-advisories@github.com
  - url: 'https://github.com/grpc/grpc-go/pull/9331'
    label: security-advisories@github.com
  - url: 'https://github.com/grpc/grpc-go/pull/9333'
    label: security-advisories@github.com
  - url: 'https://github.com/grpc/grpc-go/releases/tag/v1.83.1'
    label: security-advisories@github.com
  - url: 'https://github.com/grpc/grpc-go/security/advisories/GHSA-vp52-pcj8-j9qc'
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84304'
  - url: 'https://github.com/advisories/GHSA-vp52-pcj8-j9qc'
  - url: 'https://github.com/grpc/grpc-go'
tags:
  - nvd
  - ghsa
  - go
  - osv
epss: 0.0073
epssPercentile: 0.52216
aliases:
  - GHSA-vp52-pcj8-j9qc
  - GO-2026-6348
ecosystem: go
ingestedAt: '2026-09-01T22:33:20.559Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-84304)

Affected packages:

- `google.golang.org/grpc <= 1.83.0`

Patched in:

- `google.golang.org/grpc 1.83.1`

Source: https://github.com/advisories/GHSA-vp52-pcj8-j9qc