Description
In Eclipse Jetty versions 12.0.0 to 12.0.16 included, an HTTP/2 client can specify a very large value for the HTTP/2 settings parameter SETTINGS_MAX_HEADER_LIST_SIZE.
The Jetty HTTP/2 server does not perform validation on this setting, and tries to allocate a ByteBuffer of the specified capacity to encode HTTP responses, likely resulting in OutOfMemoryError being thrown, or even the JVM process exiting.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Eclipse Foundation | Jetty | 12.0.0 – ≤ 12.0.16 | — |
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 | jetty12 | 12.0.17-1 | — |
| Debian 13 | jetty12 | 12.0.17-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | jetty9 | No fix yet | — |
| Ubuntu 26.04 LTS | jetty9 | No fix yet | — |
| Ubuntu 25.10 | jetty9 | No fix yet | — |
| Ubuntu 24.04 LTS | jetty9 | No fix yet | — |
| Ubuntu 22.04 LTS | jetty9 | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | jetty9 | No fix yet | — |
| Ubuntu 18.04 LTS | jetty9 | No fix yet | — |
| Ubuntu 16.04 LTS | jetty +1 | No fix yet | — |
| Ubuntu 14.04 LTS | jetty | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Ocp Tools 4 | jenkins | 2.504.2.1750846524-3.el9 | RHSA-2025:10120, RHSA-2025:10119, RHSA-2025:10118 |
| Red Hat Ocp Tools 4 | jenkins-2-plugins | 4.12.1750933270-1.el8 | RHSA-2025:10120, RHSA-2025:10119, RHSA-2025:10118 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.eclipse.jetty.http2:jetty-http2-common | >= 12.0.0, < 12.0.17 | 12.0.17 | GHSA-889j-63jv-qhr8 |
Advisories 11
- WID-SEC-2025-0987 Eclipse Jetty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2026
- RHSA-2025:10120 Red Hat Security Advisory: Red Hat Product OCP Tools 4.14 OpenShift Jenkins security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2025:10118 Red Hat Security Advisory: Red Hat Product OCP Tools 4.12 OpenShift Jenkins security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2025:10119 Red Hat Security Advisory: Red Hat Product OCP Tools 4.13 OpenShift Jenkins security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2025:10104 Red Hat Security Advisory: Red Hat Product OCP Tools 4.15 OpenShift Jenkins security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2025:10097 Red Hat Security Advisory: Red Hat Product OCP Tools 4.17 OpenShift Jenkins security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2025:10098 Red Hat Security Advisory: Red Hat Product OCP Tools 4.16 OpenShift Jenkins security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2025:10092 Red Hat Security Advisory: Red Hat Product OCP Tools 4.18 OpenShift Jenkins security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- WID-SEC-2026-1204 Oracle Financial Services Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- WID-SEC-2025-2361 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 17, 2025
- NCSC-2025-0330 Kwetsbaarheden verholpen in Oracle Communications producten NCSC-NL (Netherlands) · Oct 23, 2025