CVE-2023-4785

Name: CVE-2023-4785
Creator: NVD / NIST
Published: 2023-09-13T17:15:10.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2023-4785 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

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

7.5/10

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

EPSS Probability

0.67%

47.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-248

Affected Software

Vendor	Product	Versions
Grpc	Grpc	>= 1.23.0, < 1.53.2
Grpc	Grpc	>= 1.54.0, < 1.54.3
Grpc	Grpc	>= 1.55.0, < 1.55.3
Grpc	Grpc	1.56.0

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
Status: Modified

Frequently Asked Questions

What is CVE-2023-4785?

How severe is CVE-2023-4785?

CVE-2023-4785 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4785?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4785?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST