CVE-2021-36154: Linuxfoundation Grpc Swift

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

HTTP2ToRawGRPCServerCodec in gRPC Swift 1.1.1 and earlier allows remote attackers to deny service via the delivery of many small messages within a single HTTP/2 frame, leading to Uncontrolled Recursion and stack consumption.

Affected products

• Linuxfoundation Grpc Swift: version 1.0.0 only; version 1.1.0 only; version 1.1.1 only

Published 2021-07-09. Last modified 2026-06-17.