CVE-2023-4785

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-248

Affected software

Vendor	Product	Versions
Google	gRPC	>= 1.56.0, <= 1.56.1; >= 1.55.0, <= 1.55.2; >= 1.54.0, <= 1.54.2; >= 1.53.0, <= 1.53.1
grpc	grpc	< 1.23; 1.57; >= 1.56.0, <= 1.56.1; >= 1.55.0, <= 155.2; >= 1.54.0, <= 1.54.2; >= 1.53.0, <= 1.53.1

References

https://github.com/grpc/grpc/pull/33656Issue Tracking, Patch
https://github.com/grpc/grpc/pull/33667Issue Tracking
https://github.com/grpc/grpc/pull/33669Issue Tracking
https://github.com/grpc/grpc/pull/33670Issue Tracking
https://github.com/grpc/grpc/pull/33672Issue Tracking
https://github.com/grpc/grpc/pull/33656Issue Tracking, Patch
https://github.com/grpc/grpc/pull/33667Issue Tracking
https://github.com/grpc/grpc/pull/33669Issue Tracking
https://github.com/grpc/grpc/pull/33670Issue Tracking
https://github.com/grpc/grpc/pull/33672Issue Tracking

Timeline

Published: Sep 13, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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