{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-48854: Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-48854","status":"final","version":"1","initial_release_date":"2026-06-15T21:55:23.629Z","current_release_date":"2026-06-15T21:55:23.629Z","revision_history":[{"date":"2026-06-15T21:55:23.629Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-48854 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-48854"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-48854"},{"category":"external","summary":"github.com","url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj"},{"category":"external","summary":"cna.erlef.org","url":"https://cna.erlef.org/cves/CVE-2026-48854.html"},{"category":"external","summary":"osv.dev","url":"https://osv.dev/vulnerability/EEF-CVE-2026-48854"},{"category":"external","summary":"github.com","url":"https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"}]},"product_tree":{"branches":[{"category":"vendor","name":"elixir-grpc","branches":[{"category":"product_name","name":"grpc","branches":[{"category":"product_version_range","name":">=0.3.1 <1.0.0","product":{"name":"elixir-grpc grpc >=0.3.1 <1.0.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"elixir-grpc","branches":[{"category":"product_name","name":"grpc","branches":[{"category":"product_version_range","name":">=d1abe70a6cad6dac4a3f8235d883d7c896989560 <49e18c3ec6bb9afe2f712caad3dbab5c56a68a00","product":{"name":"elixir-grpc grpc >=d1abe70a6cad6dac4a3f8235d883d7c896989560 <49e18c3ec6bb9afe2f712caad3dbab5c56a68a00","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-48854","title":"Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"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","baseScore":8.7,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 1.0.0, 49e18c3ec6bb9afe2f712caad3dbab5c56a68a00.","product_ids":["CSAFPID-1","CSAFPID-2"],"url":"https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00"}]}]}