CVE-2026-10051 Eclipse Jetty: Cross-Request Leakage for trailers on HTTP/1.1 keep-alive connections
Attackers can leak HTTP trailer headers from previous requests on the same connection, exposing sensitive data to subsequent clients.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-10051?
CVE-2026-10051 is a medium-severity vulnerability in Eclipse Jetty, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Eclipse Jetty, a first HTTP/1.1 request with trailers causes the server to retain the trailers in subsequent requests performed over the same connection. Subsequent request that do not have trailers report the trailers of the first request. Subsequent request that do have trailers report the union of trailers of the first request and the current request.
Weakness: CWE-200
Which versions are affected by CVE-2026-10051?
4 open source packages ship an affected version, including org.eclipse.jetty:jetty-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.eclipse.jetty:jetty-server Maven | From 12.0.0 | 12.0.36 |
org.eclipse.jetty:jetty-server Maven | From 12.0.0 | 12.0.36 |
org.eclipse.jetty:jetty-server Maven | From 12.1.0 | 12.1.10 |
org.eclipse.jetty:jetty-server Maven | From 12.1.0 | 12.1.10 |
Products include Eclipse Jetty.
How do I fix CVE-2026-10051?
Upgrade org.eclipse.jetty:jetty-server to a fixed version for your release line: 12.0.36 or 12.1.10.
Is CVE-2026-10051 being exploited?
There is no known exploitation of CVE-2026-10051 in the wild and no public exploit code.
Other vulnerabilities in Eclipse Jetty
- CVE-2016-4800 Jetty contains an alias issue that could allow unauthenticated remote code execution due to specially crafted request
- CVE-2019-17638 Operation on a Resource after Expiration or Release in Jetty Server
- CVE-2018-12538 Access and integrity issue within Eclipse Jetty
- CVE-2026-10050 Digest authentication lossy encoding
- CVE-2025-5115 MadeYouReset HTTP/2 vulnerability
Sources
Also known as CLEANSTART-2026-CI10932, CLEANSTART-2026-EB27094, CLEANSTART-2026-LD18869, CLEANSTART-2026-LO54000, CLEANSTART-2026-PE66600, CLEANSTART-2026-QJ10298 and 51 more.