CVE catalog
CVE-2026-42584
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll() once
- Severity
- High · CVSS 7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.84% · Oct 25, 2026
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll() once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103, then 200 with GET body, then 200 for HEAD, the queue pairs HEAD with the first 200. The HEAD rule then skips reading that message’s body, so the GET entity bytes stay on the stream and the following 200 is parsed from the wrong offset. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | netty | sid | 1:4.1.48-16 | vulnerable |
| Debian | netty | forky | 1:4.1.48-16 | vulnerable |
| Debian | netty | trixie | 1:4.1.48-10+deb13u1 | vulnerable |
| Debian | netty | trixie-security | 1:4.1.48-10+deb13u1 | vulnerable |
| Debian | netty | bookworm | 1:4.1.48-7+deb12u2 | vulnerable |
| Debian | netty | bookworm-security | 1:4.1.48-7+deb12u2 | vulnerable |
| Cpe | netty | Not reported | 1:4.1.48-9ubuntu0.1+esm3 | fixed |
| Cpe | libnetty-java | Not reported | 1:4.1.48-9ubuntu0.1+esm3 | fixed |
| Cpe | netty | Not reported | Not reported | vulnerable |
| Cpe | netty | Not reported | 4.1.133 | fixed |
| Cpe | netty | Not reported | 4.2.13 | fixed |
| Cpe | netty | Not reported | 4.2.13 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | netty | source | sid | (unfixed) | not yet assigned | Not reported | [1139914] |
| Debian | netty | source | forky | (unfixed) | not yet assigned | Not reported | [1139914] |
| Debian | netty | source | trixie | (unfixed) | not yet assigned | Not reported | [1139914] |
| Debian | netty | source | bookworm | (unfixed) | not yet assigned | Not reported | [1139914] |
| Cpe | netty | cpe | Not reported | 1:4.1.48-9ubuntu0.1+esm3 | Not reported | Not reported | Not reported |
| Cpe | libnetty-java | cpe | Not reported | 1:4.1.48-9ubuntu0.1+esm3 | Not reported | Not reported | Not reported |
| Cpe | netty | cpe | Not reported | 4.1.133 | Not reported | Not reported | Not reported |
| Cpe | netty | cpe | Not reported | 4.2.13 | Not reported | Not reported | Not reported |
| Cpe | netty | cpe | Not reported | 4.2.13 | Not reported | NVD-CVE-2026-42584 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libnetty-java]Affected
Source package: [netty]
Details (4)
1:4.1.48-7+deb12u2· all · bookwormAffected
nvd · netty · debian · bookworm; nvd · netty · debian · 12
1:4.1.48-7+deb12u2· all · bookwormAffected
nvd · netty · debian · bookworm; nvd · netty · debian · 12
1:4.1.48-7+deb12u2· all · bookworm-securityAffected
nvd · netty · debian · bookworm; nvd · netty · debian · 12
1:4.1.48-7+deb12u2· all · bookworm-securityAffected
nvd · netty · debian · bookworm; nvd · netty · debian · 12
[Debian 13 (Trixie)]
- [libnetty-java]Affected
Source package: [netty]
Details (4)
1:4.1.48-10+deb13u1· all · trixieAffected
nvd · netty · debian · 13
1:4.1.48-10+deb13u1· all · trixieAffected
nvd · netty · debian · 13
1:4.1.48-10+deb13u1· all · trixie-securityAffected
nvd · netty · debian · 13
1:4.1.48-10+deb13u1· all · trixie-securityAffected
nvd · netty · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:23808]
- [https://access.redhat.com/errata/RHSA-2026:24502]
- [https://access.redhat.com/errata/RHSA-2026:25123]
- [https://access.redhat.com/errata/RHSA-2026:28010]
- [https://access.redhat.com/errata/RHSA-2026:36820]
- [https://access.redhat.com/errata/RHSA-2026:37390]
- [https://access.redhat.com/errata/RHSA-2026:42644]
- [https://access.redhat.com/errata/RHSA-2026:49700]
- [https://access.redhat.com/errata/RHSA-2026:49701]
- [https://access.redhat.com/errata/RHSA-2026:53644]
- [https://access.redhat.com/errata/RHSA-2026:53645]
- [https://access.redhat.com/errata/RHSA-2026:53646]
- [https://access.redhat.com/errata/RHSA-2026:54435]
- [https://access.redhat.com/errata/RHSA-2026:65126]
- [https://access.redhat.com/errata/RHSA-2026:66488]
- [https://access.redhat.com/errata/RHSA-2026:66545]
- [https://access.redhat.com/security/cve/CVE-2026-42584]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2477224]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10795-1.json]
- [https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42584]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-42584]
- [https://security-tracker.debian.org/tracker/CVE-2026-42584]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42584.json]
- [https://ubuntu.com/security/notices/USN-8401-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1955.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]