# Netty-Codec-Http3 vulnerabilities

Source: https://junglewise.ai/threats/technologies/netty-codec-http3  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/netty-codec-http3.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Netty-Codec-Http3: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-100663, was published on 26 September 2026. Nothing in the last four weeks, down from 4 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 4
- All time: 4 (0 critical, 0 exploited in the wild)

## About Netty-Codec-Http3

Java library providing HTTP/3 protocol support for Netty framework.

## Latest Netty-Codec-Http3 vulnerabilities

- [CVE-2026-100663: Netty HTTP/3 codec CONNECT authority-form parsing bypass](https://junglewise.ai/threats/cve-2026-100663-netty-s-http-3-codec-io-netty-netty-codec-http3-from-4-2-2-final) (high, CVSS 7.5, published 26 Sep 2026)
- [CVE-2026-100662: Netty HTTP/3 QPACK encoder-stream unbounded memory consumption](https://junglewise.ai/threats/cve-2026-100662-netty-s-http-3-codec-io-netty-netty-codec-http3-versions-4-2-0) (high, CVSS 7.5, published 26 Sep 2026)
- [CVE-2026-100661: Netty HTTP/3 codec QPACK prefixed-integer denial-of-service](https://junglewise.ai/threats/cve-2026-100661-netty-s-http-3-codec-io-netty-netty-codec-http3-versions-4-2-0) (high, CVSS 7.5, published 26 Sep 2026)
- [CVE-2026-100660: Netty netty-codec-http3 unbounded QPACK encoder memory retention](https://junglewise.ai/threats/cve-2026-100660-netty-s-http-3-codec-io-netty-netty-codec-http3-from-4-2-0-final) (high, CVSS 7.5, published 26 Sep 2026)

## Most severe Netty-Codec-Http3 vulnerabilities

- [CVE-2026-100663: Netty HTTP/3 codec CONNECT authority-form parsing bypass](https://junglewise.ai/threats/cve-2026-100663-netty-s-http-3-codec-io-netty-netty-codec-http3-from-4-2-2-final) (high, CVSS 7.5, published 26 Sep 2026)
- [CVE-2026-100662: Netty HTTP/3 QPACK encoder-stream unbounded memory consumption](https://junglewise.ai/threats/cve-2026-100662-netty-s-http-3-codec-io-netty-netty-codec-http3-versions-4-2-0) (high, CVSS 7.5, published 26 Sep 2026)
- [CVE-2026-100661: Netty HTTP/3 codec QPACK prefixed-integer denial-of-service](https://junglewise.ai/threats/cve-2026-100661-netty-s-http-3-codec-io-netty-netty-codec-http3-versions-4-2-0) (high, CVSS 7.5, published 26 Sep 2026)
- [CVE-2026-100660: Netty netty-codec-http3 unbounded QPACK encoder memory retention](https://junglewise.ai/threats/cve-2026-100660-netty-s-http-3-codec-io-netty-netty-codec-http3-from-4-2-0-final) (high, CVSS 7.5, published 26 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 4 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 4 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Netty technologies

- [Netty](https://junglewise.ai/threats/technologies/netty): 25 vulnerabilities
- [Netty-Codec-Http](https://junglewise.ai/threats/technologies/netty-netty-codec-http): 18 vulnerabilities
- [Netty-Handler](https://junglewise.ai/threats/technologies/netty-handler): 5 vulnerabilities
- [Netty Codec HTTP/3](https://junglewise.ai/threats/technologies/codec-http-3): 4 vulnerabilities
- [Netty TCNative](https://junglewise.ai/threats/technologies/tcnative): 4 vulnerabilities
- [Netty-Resolver-Dns](https://junglewise.ai/threats/technologies/netty-resolver-dns): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Netty-Codec-Http3 vulnerabilities", https://junglewise.ai/threats/technologies/netty-codec-http3, 9 November 2026.