Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-84304— gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation

Quick assessment

Affected
grpc grpc-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

gRPC-Go是grpc组织的一款基于HTTP/2协议的远程过程调用框架。 grpc gRPC-Go 1.83.1之前版本存在资源管理错误漏洞，该漏洞源于transport.go将每个分片的HTTP/2 DATA帧作为独立recvMsg存储在recvBuffer中，导致即使有效载荷字节保持在连接和流控制窗口内，堆内存消耗也会过大，未经身份验证的远程攻击者可通过并发多路复用流耗尽进程内存，导致运行时恐慌或内存耗尽终止。

CVSS 8.7 · High EPSS 0.61% · P49

Possible ATT&CK Techniques 2 AI

T1004 T1024

Affected Version Matrix 1

VendorProduct Version RangeStatus
grpc grpc-go < 1.83.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-84304

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
grpc gRPC-Go 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
gRPC-Go是grpc组织的一款基于HTTP/2协议的远程过程调用框架。 grpc gRPC-Go 1.83.1之前版本存在资源管理错误漏洞，该漏洞源于transport.go将每个分片的HTTP/2 DATA帧作为独立recvMsg存储在recvBuffer中，导致即使有效载荷字节保持在连接和流控制窗口内，堆内存消耗也会过大，未经身份验证的远程攻击者可通过并发多路复用流耗尽进程内存，导致运行时恐慌或内存耗尽终止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
grpc grpc-go < 1.83.1 -

II. Public POCs for CVE-2026-84304

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-84304

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-84304 (3)

Vendor Advisories for CVE-2026-84304 (1)

Vendor Pages for CVE-2026-84304 (1)

IV. Related Vulnerabilities

Same product: grpc-go
Same vendor: grpc
Same weakness: CWE-400