Executive brief
Eclipse Jetty, a widely used web server and servlet engine, is vulnerable to a memory leak when handling certain types of web requests. An attacker can exploit this by sending specific network traffic that causes the server to run out of memory and crash. This results in a denial-of-service, making the web application or service unavailable to legitimate users.
Technical details
A memory leak exists in Eclipse Jetty's server component (CWE-401) related to uncontrolled resource consumption (CWE-400). The vulnerability occurs when the server handles requests with a body where reading the body results in zero bytes being read, which fails to release an allocated buffer. This is most easily triggered using '100-Continue' requests or via slow network connections. A remote, unauthenticated attacker can exploit this by sending a high volume of such requests, eventually exhausting the JVM heap memory and causing an OutOfMemoryError (OOM), leading to a denial-of-service. The issue is fixed in versions 10.0.23 and 11.0.23.
Affected products
- Eclipse Jetty >= 10.0.7, < 10.0.23; >= 11.0.7, < 11.0.23
Timeline
- 2026-07-14: advisory: NVD publication date
- 2026-07-22: disclosed: GitHub Advisory published
- 2026-07-22: patched: Patched versions 10.0.23 and 11.0.23 released