CVE-2026-48854
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| elixir-grpc | grpc | 0.3.1 < 1.0.0 | affected |
| elixir-grpc | grpc | d1abe70a6cad6dac4a3f8235d883d7c896989560 < 49e18c3ec6bb9afe2f712caad3dbab5c56a68a00 | affected |
Weaknesses
- CWE-770: CWE-770 Allocation of Resources Without Limits or Throttling
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: partial
Additional References
References
- https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj
- https://cna.erlef.org/cves/CVE-2026-48854.html
- https://osv.dev/vulnerability/EEF-CVE-2026-48854
- https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00
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