# Netty Codec HTTP/3 vulnerabilities

Source: https://junglewise.ai/threats/technologies/codec-http-3  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/codec-http-3.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Netty Codec HTTP/3: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-56816, was published on 21 July 2026.

## Counts

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

## About Netty Codec HTTP/3

Netty library providing HTTP/3 codec implementation for protocol handling.

## Latest Netty Codec HTTP/3 vulnerabilities

- [CVE-2026-56816: Netty memory exhaustion in Http3FrameCodec](https://junglewise.ai/threats/cve-2026-56816-netty-memory-exhaustion-in-http3framecodec) (high, CVSS 7.5, published 21 Jul 2026)
- [CVE-2026-48748: Netty memory exhaustion in HTTP/3 QPACK decoder](https://junglewise.ai/threats/cve-2026-48748-netty-memory-exhaustion-in-http-3-qpack-decoder) (high, CVSS 7.5, published 12 Jun 2026)
- [CVE-2026-44892: Netty memory exhaustion in Http3ConnectionHandler](https://junglewise.ai/threats/cve-2026-44892-netty-memory-exhaustion-in-http3connectionhandler) (high, CVSS 7.5, published 12 Jun 2026)
- [CVE-2026-42582: Netty unbounded memory allocation in HTTP/3 QPACK decoder](https://junglewise.ai/threats/cve-2026-42582-netty-unbounded-memory-allocation-in-http-3-qpack-decoder) (high, CVSS 7.5, published 13 May 2026)

## Most severe Netty Codec HTTP/3 vulnerabilities

- [CVE-2026-48748: Netty memory exhaustion in HTTP/3 QPACK decoder](https://junglewise.ai/threats/cve-2026-48748-netty-memory-exhaustion-in-http-3-qpack-decoder) (high, CVSS 7.5, published 12 Jun 2026)
- [CVE-2026-56816: Netty memory exhaustion in Http3FrameCodec](https://junglewise.ai/threats/cve-2026-56816-netty-memory-exhaustion-in-http3framecodec) (high, CVSS 7.5, published 21 Jul 2026)
- [CVE-2026-44892: Netty memory exhaustion in Http3ConnectionHandler](https://junglewise.ai/threats/cve-2026-44892-netty-memory-exhaustion-in-http3connectionhandler) (high, CVSS 7.5, published 12 Jun 2026)
- [CVE-2026-42582: Netty unbounded memory allocation in HTTP/3 QPACK decoder](https://junglewise.ai/threats/cve-2026-42582-netty-unbounded-memory-allocation-in-http-3-qpack-decoder) (high, CVSS 7.5, published 13 May 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| 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 | 0 | 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-Http3](https://junglewise.ai/threats/technologies/netty-codec-http3): 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 HTTP/3 vulnerabilities", https://junglewise.ai/threats/technologies/codec-http-3, 11 November 2026.