CVE-2026-48853
Severity CVSS v4.0:
CRITICAL
Type:
CWE-502
Deserialization of Untrusted Dat
Publication date:
15/06/2026
Last modified:
15/06/2026
Description
Deserialization of Untrusted Data and Allocation of Resources Without Limits or Throttling vulnerabilities in elixir-grpc grpc allow unauthenticated attackers to crash the BEAM node via atom table exhaustion and, when a decoded term flows into a call site that invokes it, achieve remote code execution on the server.<br />
<br />
&#39;Elixir.GRPC.Codec.Erlpack&#39;:decode/2 (lib/grpc/codec/erlpack.ex) calls :erlang.binary_to_term/1 on the raw gRPC message body without the :safe option, no size bound, and no type guard. Any unauthenticated peer that sends a request with Content-Type: application/grpc+erlpack can send a crafted payload that mints arbitrary new atoms (which are never garbage-collected, exhausting the bounded atom table and crashing the VM) or that encodes a fun term which, if applied anywhere downstream, executes attacker-controlled code inside the server process.<br />
<br />
This issue affects grpc from 0.4.0 before 1.0.0.
Impact
Base Score 4.0
9.20
Severity 4.0
CRITICAL