{"id":"CVE-2023-4785","aliases":["GHSA-p25m-jpj4-qcrr","PYSEC-2026-1428"],"url":"https://o3.security/vulnerability/CVE-2023-4785","summary":"Denial of Service in gRPC Core","details":"Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.","published":"2023-09-13T16:31:55.664Z","modified":"2026-07-22T02:50:17.317794Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"grpcio","fixedVersion":"1.55.3"},{"ecosystem":"PyPI","name":"grpcio","fixedVersion":"1.54.3"},{"ecosystem":"PyPI","name":"grpcio","fixedVersion":"1.53.2"},{"ecosystem":"RubyGems","name":"grpc","fixedVersion":"1.56.2"},{"ecosystem":"RubyGems","name":"grpc","fixedVersion":"1.55.3"},{"ecosystem":"RubyGems","name":"grpc","fixedVersion":"1.54.3"},{"ecosystem":"RubyGems","name":"grpc","fixedVersion":"1.53.2"}],"fix":{"url":"https://github.com/grpc/grpc/pull/33656","label":"grpc/grpc#33656"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4785.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-4785"},{"type":"FIX","url":"https://github.com/grpc/grpc/pull/33656"},{"type":"FIX","url":"https://github.com/grpc/grpc/pull/33667"},{"type":"FIX","url":"https://github.com/grpc/grpc/pull/33669"},{"type":"FIX","url":"https://github.com/grpc/grpc/pull/33670"},{"type":"FIX","url":"https://github.com/grpc/grpc/pull/33672"},{"type":"PACKAGE","url":"https://github.com/grpc/grpc"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-22T02:50:17.317794Z"}}