CVE-2023-1428: PYSEC-2026-1425 - gRPC Reachable Assertion issue

CVE-2023-1428 · Severity: low · CVSS 3.1 · Published 2026-07-07

gRPC Reachable Assertion issue

Technologies: io.grpc:grpc-protobuf (Maven), grpcio (PyPI). Vendors: Maven, PyPI.

Quick answers

Is CVE-2023-1428 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2023-1428 being exploited in the wild.
How severe is CVE-2023-1428?
Low severity, with a CVSS score of 3.1, published 7 July 2026.
Which products and versions are affected?
io.grpc:grpc-protobuf (Maven) ECOSYSTEM:introduced=1.51.0,fixed=1.53.0; grpcio (PyPI) ECOSYSTEM:introduced=1.51.0,fixed=1.53.0.
Is there a fix for CVE-2023-1428?
Yes. io.grpc:grpc-protobuf (Maven): upgrade to 1.53.0 or later; grpcio (PyPI): upgrade to 1.53.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2023-1428?
Check whether you run io.grpc:grpc-protobuf (Maven) or grpcio (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • io.grpc:grpc-protobuf (Maven): upgrade to 1.53.0 or later
    # set io.grpc:grpc-protobuf to 1.53.0 in your pom.xml or build.gradle
  • grpcio (PyPI): upgrade to 1.53.0 or later
    pip install "grpcio>=1.53.0"

Affected products

  • io.grpc:grpc-protobuf (Maven) ECOSYSTEM:introduced=1.51.0,fixed=1.53.0
  • grpcio (PyPI) ECOSYSTEM:introduced=1.51.0,fixed=1.53.0

Identifiers

  • CVE-2023-1428
  • GHSA-6628-q6j9-w8vg
  • PYSEC-2026-1425

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