Answer in brief
CVE-2023-4785 records a High severity (CVSS 7.5) vulnerability in Denial of Service Vulnerability in gRPC TCP Server (Posix-compatible platforms). The current sources do not mark it as known exploited. The current feed maps grpcio (pypi), grpcio (pypi), grpcio (pypi), grpc (rubygems) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps grpcio (pypi), grpcio (pypi), grpcio (pypi), grpc (rubygems) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| grpciopypi | >=1.55.0 <1.55.3 | 1.55.3 |
| grpciopypi | >=1.54.0 <1.54.3 | 1.54.3 |
| grpciopypi | >=1.53.0 <1.53.2 | 1.53.2 |
| grpcrubygems | >=1.56.0 <1.56.2 | 1.56.2 |
| grpcrubygems | >=1.55.0 <1.55.3 | 1.55.3 |
| grpcrubygems | >=1.54.0 <1.54.3 | 1.54.3 |
| grpcrubygems | >=1.53.0 <1.53.2 | 1.53.2 |
Published upstream
Sep 13, 2023
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Aug 8, 2026
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.
Quoted source text, attributed separately from HOL analysis.