Vulnerability · Published Sep 13, 2023 · Assigned by Google
CVE-2023-4785Denial of Service in gRPC Core
High 7.5
In plain English
A high-severity security flaw in gRPC from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | grpc | no fix listed | DEBIAN-CVE-2023-4785 |
| Debian:13 | grpc | no fix listed | DEBIAN-CVE-2023-4785 |
| Debian:14 | grpc | no fix listed | DEBIAN-CVE-2023-4785 |
| PyPI | grpcio | 1.53.2, 1.54.3, 1.55.3 | PYSEC-2026-1428 |
| PyPI | grpcio | 1.55.3 | GHSA-p25m-jpj4-qcrr |
| PyPI | grpcio | 1.54.3 | GHSA-p25m-jpj4-qcrr |
| PyPI | grpcio | 1.53.2 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | 1.56.2 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | 1.55.3 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | 1.54.3 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | 1.53.2 | GHSA-p25m-jpj4-qcrr |
| Ubuntu:22.04:LTS | grpc | no fix listed | UBUNTU-CVE-2023-4785 |
| Ubuntu:24.04:LTS | grpc | no fix listed | UBUNTU-CVE-2023-4785 |
| Ubuntu:25.10 | grpc | no fix listed | UBUNTU-CVE-2023-4785 |
| Ubuntu:26.04:LTS | grpc | no fix listed | UBUNTU-CVE-2023-4785 |
| Ubuntu:26.10 | grpc | no fix listed | UBUNTU-CVE-2023-4785 |
Affected products (as reported)
Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H