Description
Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator flags an out-of-date OCSP response but does not stop processing it, so an expired GOOD response is still reported as VALID, letting an on-path attacker replay a stale GOOD response to bypass revocation of a since-revoked certificate. Exploitation can lead to certificate revocation bypass via replay of an expired OCSP response. Any application using OcspServerCertificateValidator is affected; a revoked certificate can be accepted. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| netty | netty | < 4.1.136.Final, >= 4.2.0.Final, < 4.2.16.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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | netty | 4.1.136-150200.4.53.1 | SUSE-SU-2026:3482-1 |
| SLES 15 SP7 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
| SLES 15 SP6 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
| SLES 15 SP5 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
| SLES 15 SP4 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
| SLES for SAP 15 SP5 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
| SLES for SAP 15 SP4 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
| SLE HPC 15 SP5 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
| SLE HPC 15 SP4 | netty-tcnative | 2.0.80-150200.3.48.1 | SUSE-SU-2026:3482-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | netty | 4.1.136-1.1 | openSUSE-SU-2026:11394-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | cassandra-5.0 | 5.0.8-r12 | — |
| Wolfi rolling | management-api-for-apache-cassandra-5.0 | 0.1.122-r2 | — |
| Wolfi rolling | tez | 0.10.5-r21 | — |
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.3-r6 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.netty:netty-handler-ssl-ocsp | >= 4.2.0.Final, < 4.2.16.Final | 4.2.16.Final | GHSA-g7hg-vrcf-mvmr |
| Maven | io.netty:netty-handler-ssl-ocsp | < 4.1.136.Final | 4.1.136.Final | GHSA-g7hg-vrcf-mvmr |
Advisories 3
- WID-SEC-2026-2356 Netty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2026
- SUSE-SU-2026:3482-1 Security update for netty, netty-tcnative SUSE / openSUSE Security Updates · Aug 5, 2026
- openSUSE-SU-2026:11394-1 netty-4.1.136-1.1 on GA media SUSE / openSUSE Security Updates · Jul 29, 2026