CVE-2026-84304
Severity not reportedgRPC-Go is the Go language implementation of gRPC.
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.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/grpc/grpc-go/commit/7354d9c8debb4bcf2225bf429857078de310c176 security-advisories@github.com
- https://github.com/grpc/grpc-go/commit/8cfeca0e1ee5ea0980dcc320e20240fa1079ec77 security-advisories@github.com
- https://github.com/grpc/grpc-go/pull/9331 security-advisories@github.com
- https://github.com/grpc/grpc-go/pull/9333 security-advisories@github.com
- https://github.com/grpc/grpc-go/releases/tag/v1.83.1 security-advisories@github.com
- https://github.com/grpc/grpc-go/security/advisories/GHSA-vp52-pcj8-j9qc security-advisories@github.com