Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| netty | netty | < 4.1.137.Final, >= 4.2.0.Final, < 4.2.17.Final | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | netty | No fix yet | — |
| Debian 13 | netty | No fix yet | — |
| Debian 12 | netty | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | netty | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 24.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 22.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 20.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 18.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 16.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 14.04 LTS | netty | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss EAP 8 | eap8-apache-cxf +3 | 4.1.8-1.redhat_00001.1.el8eap | RHSA-2026:92059, RHSA-2026:92057, RHSA-2026:92056 |
| Red Hat JBoss EAP 8 | eap8-apache-sshd | 2.19.0-1.redhat_00001.1.el8eap | RHSA-2026:92057 |
| Red Hat JBoss EAP 8 | eap8-netty +14 | 4.1.138-1.Final_redhat_00001.1.el8eap | RHSA-2026:92059, RHSA-2026:92057, RHSA-2026:92056 |
| Red Hat JBoss EAP 8 | eap8-resteasy +15 | 6.2.19-1.Final_redhat_00002.1.el8eap | RHSA-2026:92059, RHSA-2026:92057, RHSA-2026:92056 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | netty | 4.1.138-150200.4.56.1 | SUSE-SU-2026:4391-1 |
| SLES 15 SP7 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
| SLES 15 SP6 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
| SLES 15 SP5 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
| SLES 15 SP4 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
| SLES for SAP 15 SP5 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
| SLES for SAP 15 SP4 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
| SLE HPC 15 SP5 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
| SLE HPC 15 SP4 | netty-tcnative | 2.0.84-150200.3.51.1 | SUSE-SU-2026:4391-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | netty | 4.1.138-1.1 | openSUSE-SU-2026:11882-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | akhq | 0.28.0-r7 | — |
| Wolfi rolling | apache-activemq-artemis | 2.55.0-r4 | — |
| Wolfi rolling | apache-pulsar-4.2 | 4.2.4-r2 | — |
| Wolfi rolling | apicurio-registry | 3.3.1-r7 | — |
| Wolfi rolling | celeborn-0.6 | 0.6.3-r16 | — |
| Wolfi rolling | druid | 37.0.0-r53 | — |
| Wolfi rolling | flyway | 13.3.0-r1 | — |
| Wolfi rolling | infinispan-16.1 | 16.1.4-r11 | — |
| Wolfi rolling | infinispan-16.2 | 16.2.2-r3 | — |
| Wolfi rolling | keycloak-26.6 +2 | 26.6.4-r24 | — |
| Wolfi rolling | kserve-modelmesh | 0.12.0-r39 | — |
| Wolfi rolling | logstash-9.3 +5 | No fix yet | — |
| Wolfi rolling | logstash-9.4 +1 | 9.4.5-r3 | — |
| Wolfi rolling | management-api-for-apache-cassandra-5.0 | 0.1.124-r1 | — |
| Wolfi rolling | neo4j-2026.05 +1 | 2026.05.0-r12 | — |
| Wolfi rolling | neo4j-2026.06 | 2026.06.0-r9 | — |
| Wolfi rolling | neo4j-2026.07 | 2026.07.1-r2 | — |
| Wolfi rolling | opensearch-2 | 2.19.6-r8 | — |
| Wolfi rolling | opensearch-3 +6 | 3.8.0-r0 | — |
| Wolfi rolling | opensearch-3-discovery-ec2 +2 | 3.8.0-r3 | — |
| Wolfi rolling | opensearch-3-security-analytics | 3.8.0-r2 | — |
| Wolfi rolling | sonarqube | 26.9.0.129388-r4 | — |
| Wolfi rolling | spark-4.0-scala-2.13 | 4.0.4-r2 | — |
| Wolfi rolling | spark-4.1-scala-2.13 | 4.1.3-r4 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-init +6 | 1.2.0-r1 | — |
| Wolfi rolling | tez | 0.10.5-r28 | — |
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.3-r22 | — |
| Wolfi rolling | trino +3 | 483-r7 | — |
| Wolfi rolling | trino-plugin-hive +12 | 483-r3 | — |
| Wolfi rolling | wavefront-proxy | 13.9-r25 | — |
| Wolfi rolling | wildfly-openjdk-17 +1 | 41.0.0-r4 | — |
| Wolfi rolling | zipkin +1 | 3.6.1-r21 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
xiaoqiMikko/netty-http-check ★ 0 · Sep 8, 2026
CVE-2026-59903 / CVE-2026-33870: offline checker for io.netty:netty-codec-http - its 14 CVEs plus 9 advisories Netty published on 2026-09-10 that the GitHub Advisory Database (Dependabot) does not li…
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.netty:netty-codec-http | >= 4.2.0.Final, < 4.2.17.Final | 4.2.17.Final | GHSA-8c42-7qj2-3j46 |
| Maven | io.netty:netty-codec-http | < 4.1.137.Final | 4.1.137.Final | GHSA-8c42-7qj2-3j46 |
Advisories 7
- RHSA-2026:92056 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.9 security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:92059 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.9 security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:92057 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.9 security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2026-4056 Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye und Jira): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- WID-SEC-2026-2712 Netty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- SUSE-SU-2026:4391-1 Security update for netty, netty-tcnative SUSE / openSUSE Security Updates · Sep 30, 2026
- openSUSE-SU-2026:11882-1 netty-4.1.138-1.1 on GA media SUSE / openSUSE Security Updates · Sep 25, 2026