What’s Vulnerable › Vulnerabilities

CVE-2025-1948: Eclipse Jetty HTTP clients can increase memory allocation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-08 · updated 2026-06-17
• Weakness: CWE-400

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

• The Eclipse Foundation Eclipse Jetty: from 12.0.0 before 12.0.17 — fixed in 12.0.17

How to fix

Upgrade to a fixed version: The Eclipse Foundation Eclipse Jetty 12.0.17. Check the vendor advisory for mitigations.

References

• https://github.com/jetty/jetty.project/security/advisories/GHSA-889j-63jv-qhr8
• https://gitlab.eclipse.org/security/cve-assignement/-/issues/56

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