# CVE-2025-55163: Netty affected by MadeYouReset HTTP/2 DDoS vulnerability

Source: https://junglewise.ai/threats/cve-2025-55163-netty-affected-by-madeyoureset-http-2-ddos-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-08-13  
License: CC BY 4.0 with a link back

CVE-2025-55163 · Severity: low · CVSS 3.1 · Published 2025-08-13

Netty affected by MadeYouReset HTTP/2 DDoS vulnerability

Technologies: [io.netty:netty-codec-http2 (Maven)](https://junglewise.ai/threats/technologies/io-netty-netty-codec-http2). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2025-55163 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-55163 being exploited in the wild.

**How severe is CVE-2025-55163?** Low severity, with a CVSS score of 3.1, published 13 August 2025.

**Which products and versions are affected?** io.grpc:grpc-netty-shaded (Maven) ECOSYSTEM:introduced=0,fixed=1.75.0; io.netty:netty-codec-http2 (Maven) ECOSYSTEM:introduced=4.2.0.Alpha1,fixed=4.2.4.Final.

**Is there a fix for CVE-2025-55163?** Yes. io.grpc:grpc-netty-shaded (Maven): upgrade to 1.75.0 or later; io.netty:netty-codec-http2 (Maven): upgrade to 4.2.4.Final or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-55163?** Check whether you run io.grpc:grpc-netty-shaded (Maven) or io.netty:netty-codec-http2 (Maven) 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-netty-shaded (Maven): upgrade to 1.75.0 or later

  ```sh
  # set io.grpc:grpc-netty-shaded to 1.75.0 in your pom.xml or build.gradle
  ```

- io.netty:netty-codec-http2 (Maven): upgrade to 4.2.4.Final or later

  ```sh
  # set io.netty:netty-codec-http2 to 4.2.4.Final in your pom.xml or build.gradle
  ```


## Affected products

- io.grpc:grpc-netty-shaded (Maven) ECOSYSTEM:introduced=0,fixed=1.75.0
- io.netty:netty-codec-http2 (Maven) ECOSYSTEM:introduced=4.2.0.Alpha1,fixed=4.2.4.Final

## Identifiers

- CVE-2025-55163
- GHSA-prj3-ccx8-p6x4

## Related threats

- [Netty request smuggling via Host header duplication in HTTP/2 translation](https://junglewise.ai/threats/cve-2026-59900-netty-request-smuggling-via-host-header-duplication-in-http-2)
- [Netty memory leak in HTTP/2 content decompression](https://junglewise.ai/threats/cve-2026-56819-netty-memory-leak-in-http-2-content-decompression)
- [Netty denial of service in HTTP/2 codec via max header size handling](https://junglewise.ai/threats/cve-2026-50560-netty-denial-of-service-in-http-2-codec-via-max-header-size)
- [Netty memory exhaustion in DelegatingDecompressorFrameListener](https://junglewise.ai/threats/cve-2026-48043-netty-memory-exhaustion-in-delegatingdecompressorframelistener)
- [Netty uncontrolled resource consumption in HTTP/2 codec](https://junglewise.ai/threats/cve-2026-47244-netty-uncontrolled-resource-consumption-in-http-2-codec)