Technology · Maven
io.netty:netty-codec-http2 (Maven) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 11 vulnerabilities in io.netty:netty-codec-http2 (Maven): 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-2026-59900, was published on 29 July 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About io.netty:netty-codec-http2 (Maven)
Netty codec module for HTTP/2 protocol support.
Latest io.netty:netty-codec-http2 (Maven) vulnerabilities
- CVE-2026-59900: Netty request smuggling via Host header duplication in HTTP/2 translationmediumCVSS 4EPSS 0.4%
- CVE-2026-56819: Netty memory leak in HTTP/2 content decompressionhighCVSS 7.5EPSS 0.7%
- CVE-2026-50560: Netty denial of service in HTTP/2 codec via max header size handlingmediumCVSS 5.3EPSS 0.5%
- CVE-2026-48043: Netty memory exhaustion in DelegatingDecompressorFrameListenermediumCVSS 5.3EPSS 0.9%
- CVE-2026-47244: Netty uncontrolled resource consumption in HTTP/2 codecmediumCVSS 5.3EPSS 0.5%
- CVE-2026-42587: Netty denial of service via decompression limit bypasshighCVSS 7.5EPSS 1.1%
- CVE-2026-33871: Netty Denial of Service via HTTP/2 CONTINUATION frame floodhighCVSS 7.5EPSS 1.2%
- CVE-2025-55163: Netty affected by MadeYouReset HTTP/2 DDoS vulnerabilitylowCVSS 3.1EPSS 1.1%
- io.netty:netty-codec-http2 vulnerable to HTTP/2 Rapid Reset AttacklowCVSS 3.1
- CVE-2021-21409: Possible request smuggling in HTTP/2 due missing validation of content-lengthlowCVSS 3.1EPSS 4.9%
- CVE-2021-21295: Possible request smuggling in HTTP/2 due missing validationlowCVSS 3.1EPSS 18.9%
Most severe io.netty:netty-codec-http2 (Maven) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-33871: Netty Denial of Service via HTTP/2 CONTINUATION frame floodhighCVSS 7.5EPSS 1.2%
- CVE-2026-42587: Netty denial of service via decompression limit bypasshighCVSS 7.5EPSS 1.1%
- CVE-2026-56819: Netty memory leak in HTTP/2 content decompressionhighCVSS 7.5EPSS 0.7%
- CVE-2026-48043: Netty memory exhaustion in DelegatingDecompressorFrameListenermediumCVSS 5.3EPSS 0.9%
- CVE-2026-50560: Netty denial of service in HTTP/2 codec via max header size handlingmediumCVSS 5.3EPSS 0.5%
- CVE-2026-47244: Netty uncontrolled resource consumption in HTTP/2 codecmediumCVSS 5.3EPSS 0.5%
- CVE-2026-59900: Netty request smuggling via Host header duplication in HTTP/2 translationmediumCVSS 4EPSS 0.4%
- CVE-2021-21295: Possible request smuggling in HTTP/2 due missing validationlowCVSS 3.1EPSS 18.9%
- CVE-2021-21409: Possible request smuggling in HTTP/2 due missing validation of content-lengthlowCVSS 3.1EPSS 4.9%
- CVE-2025-55163: Netty affected by MadeYouReset HTTP/2 DDoS vulnerabilitylowCVSS 3.1EPSS 1.1%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many io.netty:netty-codec-http2 (Maven) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/io-netty-netty-codec-http2)<a href="https://junglewise.ai/threats/technologies/io-netty-netty-codec-http2"><img src="https://junglewise.ai/threats/technologies/io-netty-netty-codec-http2/badge.svg" alt="io.netty:netty-codec-http2 (Maven) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/io-netty-netty-codec-http2.json, and this page as text at https://junglewise.ai/threats/technologies/io-netty-netty-codec-http2.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "io.netty:netty-codec-http2 (Maven) vulnerabilities", https://junglewise.ai/threats/technologies/io-netty-netty-codec-http2, 11 November 2026.