{"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":0.00415,"epssPercentile":0.35484,"aliases":["GHSA-vp52-pcj8-j9qc","GO-2026-6348"],"ecosystem":"go","ingestedAt":"2026-09-01T22:33:20.559Z","slug":"CVE-2026-84304","body":"## Overview\n\ngRPC-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-84304)\n\nAffected packages:\n\n- `google.golang.org/grpc <= 1.83.0`\n\nPatched in:\n\n- `google.golang.org/grpc 1.83.1`\n\nSource: https://github.com/advisories/GHSA-vp52-pcj8-j9qc","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}