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CVE-2026-48853

CVE-2026-48853 · Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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. 'Elixir.GRPC.Codec.Erlpack':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. This issue affects grpc: from 0.4.0 before 1.0.0.

CVSS 9.2 · Critical · EPSS 0.8% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • grpc

    Versions
    • ≥ 0.4.0, < 1.0.0: Affected (semver)

    Update to 1.0.0

  • grpc

    Versions
    • ≥ 25bcc569fe2cc4478531a6c546c923205fc751c9, < 272a97a5ea1b46af1819f14a831fcf35fc91f992: Affected (git)

    Update to 272a97a5ea1b46af1819f14a831fcf35fc91f992

  • grpc Ubuntu:16.04:LTS

    Versions
    • 0.10.2-1
    • 0.11.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grpc Ubuntu:18.04:LTS

    Versions
    • 1.3.2-1
    • 1.3.2-1ubuntu1
    • 1.3.2-1.1~build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grpc Ubuntu:20.04:LTS

    Versions
    • 1.16.1-1
    • 1.16.1-1ubuntu1
    • 1.16.1-1ubuntu3
    • 1.16.1-1ubuntu4
    • 1.16.1-1ubuntu5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grpc Ubuntu:22.04:LTS

    Versions
    • 1.30.2-3
    • 1.30.2-3build1
    • 1.30.2-3build3
    • 1.30.2-3build5
    • 1.30.2-3build6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grpc Ubuntu:24.04:LTS

    Versions
    • 1.51.1-3build3
    • 1.51.1-3build4
    • 1.51.1-4
    • 1.51.1-4build1
    • 1.51.1-4build2
    • 1.51.1-4.1build3
    • 1.51.1-4.1build4
    • 1.51.1-4.1build5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grpc Ubuntu:25.10

    Versions
    • 1.51.1-6
    • 1.51.1-6build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grpc Ubuntu:26.10

    Versions
    • 1.51.1-8ubuntu1
    • 1.51.1-9
    • 1.51.1-9ubuntu3
    • 1.51.1-10ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • grpc Ubuntu:26.04:LTS

    Versions
    • 1.51.1-6build1
    • 1.51.1-7
    • 1.51.1-7ubuntu2
    • 1.51.1-7ubuntu3
    • 1.51.1-8ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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