Improper Handling of Highly Compressed Data (Data Amplification) Affecting grpc_core package, versions <1.0.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-HEX-GRPCCORE-17344385
- published16 Jun 2026
- disclosed15 Jun 2026
- creditPeter Ullrich
Introduced: 15 Jun 2026
NewCVE-2026-53430 (opens in a new tab)How to fix?
Upgrade grpc_core to version 1.0.0 or higher.
Overview
grpc_core is a gRPC Core Core gRPC types, codecs, and utilities for Elixir.
This package provides the foundational components used by both grpc_server and grpc:
Codecs: Protocol Buffers, JSON, WebText, Erlpack Compressors: Gzip compression support Transport: HTTP/2 utilities Core Types: Status codes, errors, credentials, telemetry Protoc Plugin: Code generation tooling
Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data (Data Amplification) via the decompress function. An attacker can cause excessive memory consumption and process termination by sending a highly compressed payload that decompresses to a very large size, exploiting the lack of decompressed-size limits or ratio checks.