{"id":"CVE-2026-48854","revision":null,"records":[{"revision":"efb1447d3ab94aca9d57557ad5fba758","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48854","aliases":[],"title":"Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc","description":"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 0.3.0-alpha.2 before 1.0.0.","state":0,"publishedAt":"2026-06-15T21:55:23.629+00:00","modifiedAt":"2026-09-24T21:09:30.485+00:00","affected":[{"ecosystem":"https://repo.hex.pm","name":"grpc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://repo.hex.pm\",\n                    \"cpes\": [\n                        \"cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"'Elixir.GRPC.Server.Adapters.Cowboy.Handler'\"\n                    ],\n                    \"packageName\": \"grpc\",\n                    \"packageURL\": \"pkg:hex/grpc\",\n                    \"product\": \"grpc\",\n                    \"programFiles\": [\n                        \"lib/grpc/server/adapters/cowboy/handler.ex\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"'Elixir.GRPC.Server.Adapters.Cowboy.Handler':read_full_body/3\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/elixir-grpc/grpc\",\n                    \"vendor\": \"elixir-grpc\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"1.0.0\",\n                            \"status\": \"affected\",\n                            \"version\": \"0.3.0-alpha.2\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"https://github.com","name":"elixir-grpc/grpc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://github.com\",\n                    \"cpes\": [\n                        \"cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"'Elixir.GRPC.Server.Adapters.Cowboy.Handler'\"\n                    ],\n                    \"packageName\": \"elixir-grpc/grpc\",\n                    \"packageURL\": \"pkg:github/elixir-grpc/grpc\",\n                    \"product\": \"grpc\",\n                    \"programFiles\": [\n                        \"lib/grpc/server/adapters/cowboy/handler.ex\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"'Elixir.GRPC.Server.Adapters.Cowboy.Handler':read_full_body/3\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/elixir-grpc/grpc\",\n                    \"vendor\": \"elixir-grpc\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"49e18c3ec6bb9afe2f712caad3dbab5c56a68a00\",\n                            \"status\": \"affected\",\n                            \"version\": \"d1abe70a6cad6dac4a3f8235d883d7c896989560\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.7,"severity":"HIGH"}],"references":["https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj","https://cna.erlef.org/cves/CVE-2026-48854.html","https://osv.dev/vulnerability/EEF-CVE-2026-48854","https://github.com/elixir-grpc/grpc/commit/d1abe70a6cad6dac4a3f8235d883d7c896989560","https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48854","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48854","identifiers":["CVE-2026-48854"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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