{"id":"CVE-2026-48853","summary":"Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc","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.\n\n'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.\n\nThis issue affects grpc from 0.4.0 before 1.0.0.","aliases":["EEF-CVE-2026-48853","GHSA-grp7-v8xh-rj7h"],"modified":"2026-06-18T03:55:44.608666221Z","published":"2026-06-15T21:56:15.262Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48853.json","cwe_ids":["CWE-502","CWE-770"],"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"25bcc569fe2cc4478531a6c546c923205fc751c9"},{"fixed":"272a97a5ea1b46af1819f14a831fcf35fc91f992"}]}],"cna_assigner":"EEF"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-48853.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-48853"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48853.json"},{"type":"ADVISORY","url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48853"},{"type":"FIX","url":"https://github.com/elixir-grpc/grpc/commit/272a97a5ea1b46af1819f14a831fcf35fc91f992"},{"type":"PACKAGE","url":"https://github.com/elixir-grpc/grpc"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elixir-grpc/grpc","events":[{"introduced":"e45282526107417bd54f57bb8298b52a7c272ccb"},{"fixed":"8105f803030f7f5ae1d722251ee6ab2e36878830"},{"fixed":"272a97a5ea1b46af1819f14a831fcf35fc91f992"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0.4.0"},{"fixed":"1.0.0"}]}}],"versions":["v0.11.2","v0.8.1","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.5.0-beta.1","v0.5.0-beta","v0.4.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/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"}]}