{"id":"UBUNTU-CVE-2026-48853","details":"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.","modified":"2026-06-24T11:01:46.173935345Z","published":"2026-06-15T23:16:00Z","upstream":["CVE-2026-48853"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-48853"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-48853"}],"affected":[{"package":{"name":"grpc","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/grpc?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.2-1","0.11.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.11.1-1","binary_name":"libgrpc0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48853.json"}},{"package":{"name":"grpc","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/grpc?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.2-1","1.3.2-1ubuntu1","1.3.2-1.1~build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libgrpc++1","binary_version":"1.3.2-1.1~build1"},{"binary_name":"libgrpc3","binary_version":"1.3.2-1.1~build1"},{"binary_name":"protobuf-compiler-grpc","binary_version":"1.3.2-1.1~build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48853.json"}},{"package":{"name":"grpc","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/grpc?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.1-1","1.16.1-1ubuntu1","1.16.1-1ubuntu3","1.16.1-1ubuntu4","1.16.1-1ubuntu5"],"ecosystem_specific":{"binaries":[{"binary_name":"libgrpc++1","binary_version":"1.16.1-1ubuntu5"},{"binary_name":"libgrpc6","binary_version":"1.16.1-1ubuntu5"},{"binary_name":"protobuf-compiler-grpc","binary_version":"1.16.1-1ubuntu5"},{"binary_name":"python3-grpcio","binary_version":"1.16.1-1ubuntu5"},{"binary_name":"ruby-grpc","binary_version":"1.16.1-1ubuntu5"},{"binary_name":"ruby-grpc-tools","binary_version":"1.16.1-1ubuntu5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48853.json"}},{"package":{"name":"grpc","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/grpc?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.30.2-3","1.30.2-3build1","1.30.2-3build3","1.30.2-3build5","1.30.2-3build6"],"ecosystem_specific":{"binaries":[{"binary_name":"libgrpc++1","binary_version":"1.30.2-3build6"},{"binary_name":"libgrpc10","binary_version":"1.30.2-3build6"},{"binary_version":"1.30.2-3build6","binary_name":"protobuf-compiler-grpc"},{"binary_name":"python3-grpcio","binary_version":"1.30.2-3build6"},{"binary_name":"ruby-grpc","binary_version":"1.30.2-3build6"},{"binary_name":"ruby-grpc-tools","binary_version":"1.30.2-3build6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48853.json"}},{"package":{"name":"grpc","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/grpc?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libgrpc++1.51t64","binary_version":"1.51.1-4.1build5"},{"binary_name":"libgrpc29t64","binary_version":"1.51.1-4.1build5"},{"binary_name":"protobuf-compiler-grpc","binary_version":"1.51.1-4.1build5"},{"binary_name":"python3-grpcio","binary_version":"1.51.1-4.1build5"},{"binary_name":"ruby-grpc","binary_version":"1.51.1-4.1build5"},{"binary_version":"1.51.1-4.1build5","binary_name":"ruby-grpc-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48853.json"}},{"package":{"name":"grpc","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/grpc?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.51.1-6","1.51.1-6build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libgrpc++1.51t64","binary_version":"1.51.1-6build1"},{"binary_name":"libgrpc29t64","binary_version":"1.51.1-6build1"},{"binary_name":"protobuf-compiler-grpc","binary_version":"1.51.1-6build1"},{"binary_name":"python3-grpcio","binary_version":"1.51.1-6build1"},{"binary_name":"ruby-grpc","binary_version":"1.51.1-6build1"},{"binary_name":"ruby-grpc-tools","binary_version":"1.51.1-6build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48853.json"}},{"package":{"name":"grpc","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/grpc?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.51.1-6build1","1.51.1-7","1.51.1-7ubuntu2","1.51.1-7ubuntu3","1.51.1-8ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libgrpc++1.51t64","binary_version":"1.51.1-8ubuntu1"},{"binary_name":"libgrpc29t64","binary_version":"1.51.1-8ubuntu1"},{"binary_name":"protobuf-compiler-grpc","binary_version":"1.51.1-8ubuntu1"},{"binary_name":"python3-grpcio","binary_version":"1.51.1-8ubuntu1"},{"binary_name":"ruby-grpc","binary_version":"1.51.1-8ubuntu1"},{"binary_version":"1.51.1-8ubuntu1","binary_name":"ruby-grpc-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48853.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}