{"id":"CVE-2026-48854","summary":"Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc","details":"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.\n\n'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.\n\nThis issue affects grpc from 0.3.1 before 1.0.0.","aliases":["EEF-CVE-2026-48854","GHSA-q8gf-9rvj-gmgj"],"modified":"2026-06-18T03:56:11.151662947Z","published":"2026-06-15T21:55:23.629Z","database_specific":{"cwe_ids":["CWE-770"],"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"d1abe70a6cad6dac4a3f8235d883d7c896989560"},{"fixed":"49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"}]}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48854.json","cna_assigner":"EEF"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-48854.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-48854"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48854.json"},{"type":"ADVISORY","url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48854"},{"type":"FIX","url":"https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"},{"type":"PACKAGE","url":"https://github.com/elixir-grpc/grpc"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elixir-grpc/grpc","events":[{"introduced":"387eb5df5413fe89d7b62246d6e5b094fd82e0f5"},{"fixed":"8105f803030f7f5ae1d722251ee6ab2e36878830"},{"fixed":"49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0.3.1"},{"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","v0.3.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-48854.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}