Vulnerability · Published Jun 15, 2026 · Assigned by EEF
CVE-2026-48854Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc
High 8.7
In plain English
A high-severity resource allocation without limits in grpc from elixir-grpc. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).
Official 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 0.3.0-alpha.2 before 1.0.0.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| elixir-grpc | grpc | 0.3.0-alpha.2 – before 1.0.0 |
| elixir-grpc | grpc | d1abe70a6cad6dac4a3f8235d883d7c896989560 – before 49e18c3ec6bb9afe2f712caad3dbab5c56a68a00 |
Weakness: CWE-770 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N