CVE-2026-48854: Elixir-Grpc Grpc

High severity, CVSS 8.7. EPSS: 0.5% chance of exploitation in the next 30 days.

Allocation of Resources Without Limits or Throttling vulnerability in elixir-grpc grpc allows unauthenticated attackers to exhaust the BEAM's memory and crash the server by streaming a large or slow-trickle unary request body. 'Elixir.GRPC.Server.Adapters.Cowboy.Handler':read_full_body/3 (lib/grpc/server/adapters/cowboy/handler.ex) accumulates every received chunk into a single growing binary with no size cap. Additionally, when the client omits the grpc-timeout header, the per-chunk read timeout resolves to :infinity, allowing a slow-trickle client to keep the connection alive indefinitely while memory grows. A single connection is sufficient to exhaust server memory and crash the node. This issue affects grpc: from 0.3.0-alpha.2 before 1.0.0.

Affected products

• Elixir-Grpc Grpc: from 0.3.0-alpha.2, before 1.0.0 (fixed in 1.0.0)

Published 2026-06-15. Last modified 2026-09-24.