CVE-2025-1948: Eclipse Jetty

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

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

• Eclipse Jetty: from 12.0.0, before 12.0.17 (fixed in 12.0.17)

Published 2025-05-08. Last modified 2026-06-17.