Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc_CVE-2026-48854

{
    "lastseen": "",
    "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 0.3.1 before 1.0.0.",
    "published": "2026-06-15T21:55:23.629Z",
    "modified": "2026-06-15T21:55:23.629Z",
    "type": "cve",
    "title": "Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc",
    "source": "EEF",
    "references": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj\nhttps://cna.erlef.org/cves/CVE-2026-48854.html\nhttps://osv.dev/vulnerability/EEF-CVE-2026-48854\nhttps://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00",
    "id": "CVE-2026-48854",
    "bulletinFamily": "",
    "cwe": [
        "CWE-770"
    ],
    "cvelist": null,
    "sourceData": "elixir-grpc grpc 0.3.1\nelixir-grpc grpc d1abe70a6cad6dac4a3f8235d883d7c896989560",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "grpc",
    "version": "0.3.1",
    "vendor": "elixir-grpc",
    "ai_description": "Unauthenticated attackers can exhaust server memory and crash the node by streaming large or slow-trickle unary request bodies due to unbounded request body accumulation in elixir-grpc/grpc",
    "ai_severity": "High",
    "ai_vendor": "Elixir-GRPC",
    "ai_product": "grpc",
    "ai_version": "0.3.1",
    "ai_score": 8.7
}