Eclipse Jetty HTTP/2 client can force the server to allocate a humongous byte buffer that may lead to OoM and subsequently the JVM to exit
Original Report
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.
Impact
Remote peers can cause the JVM to crash or continuously report OOM.
Patches
12.0.17
Workarounds
No workarounds.
References
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.eclipse.jetty.http2:jetty-http2-common | >= 12.0.0, < 12.0.17 | 12.0.17 |
References
- https://github.com/jetty/jetty.project/security/advisories/GHSA-889j-63jv-qhr8
- https://nvd.nist.gov/vuln/detail/CVE-2025-1948
- https://github.com/jetty/jetty.project/issues/12690
- https://github.com/jetty/jetty.project/commit/c8c2515936ef968dc8a3cecd9e79d1e69291e4bb
- https://github.com/jetty/jetty.project
- https://gitlab.eclipse.org/security/cve-assignement/-/issues/56
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400- Platform
- Java / Kotlin (Maven)
- Package
org.eclipse.jetty.http2:jetty-http2-common- Disclosed
- 08.05.2025
- Updated
- 11.10.2026 13:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-889j-63jv-qhr8 - CC BY 4.0
Vulnerability history: org.eclipse.jetty.http2:jetty-http2-common
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 10.2023 08.2025
- Without a fix
- 0
- Exploited in attacks
- 1
Severity breakdown
- High 3
- Medium 1
Disclosures per year
- 2023: 1
- 2024: 1
- 2025: 2
- 2026: 0
-
Eclipse Jetty HTTP/2 client can force the server to allocate a humongous byte buffer that may lead to OoM and subsequently the JVM to exit this entry
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