CVE-2026-48854 – Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc
CVE ID :CVE-2026-48854
Published : June 15, 2026, 11:16 p.m. | 25 minutes ago
Description :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 0.3.1 before 1.0.0.
Severity: 8.7 | HIGH
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