Answer in brief
CVE-2023-32732 records a Medium severity (CVSS 5.3) vulnerability in gRPC connection termination issue. The current sources do not mark it as known exploited. The current feed maps io.grpc:grpc-protobuf (maven), io.grpc:grpc-protobuf (maven), grpcio (pypi), grpcio (pypi) 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 5.3. 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 io.grpc:grpc-protobuf (maven), io.grpc:grpc-protobuf (maven), grpcio (pypi), grpcio (pypi) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| io.grpc:grpc-protobufmaven | >=1.53.0 <1.53.1 | 1.53.1 |
| io.grpc:grpc-protobufmaven | >=1.54.0 <1.54.2 | 1.54.2 |
| grpciopypi | >=1.53.0 <1.53.1 | 1.53.1 |
| grpciopypi | >=1.54.0 <1.54.2 | 1.54.2 |
| grpcrubygems | >=1.53.0 <1.53.1 | 1.53.1 |
| grpcrubygems | >=1.54.0 <1.54.2 | 1.54.2 |
Published upstream
Jul 6, 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
gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in https://github.com/grpc/grpc/pull/32309.
Quoted source text, attributed separately from HOL analysis.