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Vulnerability record · CVE-2023-4785 · published 13 September 2023

CVE-2023-4785: Grpc vulnerability

Grpc · Grpc

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.

7.5 CVSS 3.1 High EPSS 0.77% · top 46.1% CWE-248 · CWE-248
7.5CVSS 3.1 base score
0.77%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/grpc/grpc/pull/33656 Issue TrackingPatch
https://github.com/grpc/grpc/pull/33667 Issue Tracking
https://github.com/grpc/grpc/pull/33669 Issue Tracking
https://github.com/grpc/grpc/pull/33670 Issue Tracking
https://github.com/grpc/grpc/pull/33672 Issue Tracking
https://github.com/grpc/grpc/pull/33656 Issue TrackingPatch
https://github.com/grpc/grpc/pull/33667 Issue Tracking
https://github.com/grpc/grpc/pull/33669 Issue Tracking
https://github.com/grpc/grpc/pull/33670 Issue Tracking
https://github.com/grpc/grpc/pull/33672 Issue Tracking

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2023-44487HTTP/2 Rapid Reset stream cancellation denial of serviceThe HTTP/2 protocol permits a client to cancel many streams quickly, and the server's handling of those resets consumes disproportionate resources. T…KEVEPSS 100%analysed9.8CVE-2020-7768Grpc prototype pollution vulnerabilityThe package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.EPSS 4.2%9.8CVE-2017-9431Grpc out-of-bounds write vulnerabilityGoogle gRPC before 2017-04-05 has an out-of-bounds write caused by a heap-based buffer overflow related to core/lib/iomgr/error.c.EPSS 2.4%9.8CVE-2017-8359Grpc out-of-bounds write vulnerabilityGoogle gRPC before 2017-03-29 has an out-of-bounds write caused by a heap-based use-after-free related to the grpc_call_destroy function in core/lib/…EPSS 3.1%9.8CVE-2017-7860Grpc out-of-bounds write vulnerabilityGoogle gRPC before 2017-02-22 has an out-of-bounds write caused by a heap-based buffer overflow related to the parse_unix function in core/ext/client…EPSS 3.1%9.8CVE-2017-7861Grpc out-of-bounds write vulnerabilityGoogle gRPC before 2017-02-22 has an out-of-bounds write related to the gpr_free function in core/lib/support/alloc.c.EPSS 2.9%9.1CVE-2026-33186Grpc improper authorization vulnerabilitygRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of …EPSS 1.6%7.5CVE-2023-33953Grpc allocation without limits vulnerabilitygRPC contains a vulnerability that allows hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional…EPSS 0.48%

Source: NIST National Vulnerability Database (record CVE-2023-4785), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.