{"id":"EEF-CVE-2026-48854","summary":"Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc","details":"## Summary\n\nAllocation 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":["CVE-2026-48854","GHSA-q8gf-9rvj-gmgj"],"modified":"2026-07-30T18:22:09.068605Z","published":"2026-06-15T21:55:23.629Z","database_specific":{"capec_ids":["CAPEC-130","CAPEC-231"],"cpe_ids":["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-770"]},"references":[{"type":"ADVISORY","url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-48854.html"},{"type":"FIX","url":"https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"},{"type":"PACKAGE","url":"https://hex.pm/packages/grpc"}],"affected":[{"package":{"name":"grpc","ecosystem":"Hex","purl":"pkg:hex/grpc"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.3.1"},{"fixed":"1.0.0"}]}],"versions":["0.10.0","0.10.1","0.10.2","0.11.0","0.11.1","0.11.2","0.11.3","0.11.4","0.11.5","0.3.1","0.4.0-alpha.1","0.4.0-alpha.2","0.5.0","0.5.0-beta","0.5.0-beta.1","0.6.0","0.7.0","0.8.0","0.8.1","0.9.0","1.0.0-rc.1"],"database_specific":{"source":"https://cna.erlef.org/osv/EEF-CVE-2026-48854.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/elixir-grpc/grpc","events":[{"introduced":"d1abe70a6cad6dac4a3f8235d883d7c896989560"},{"fixed":"49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"}]}],"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","v0.3.0-alpha.2"],"database_specific":{"source":"https://cna.erlef.org/osv/EEF-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"}],"credits":[{"name":"Peter Ullrich","type":"FINDER"},{"name":"Paulo Valente","type":"REMEDIATION_DEVELOPER"},{"name":"Jonatan Männchen","type":"ANALYST"}]}