Resource exhaustion in Jetty - CVE-2026-12611
Published: September 16, 2026
Vulnerability identifier: #VU150237
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-12611
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of a flusher termination race in HTTP2Flusher when processing HTTP/2 requests with blocked response writes and concurrent RST_STREAM and GOAWAY frames. A remote attacker can send crafted HTTP/2 requests that block response writes and then send RST_STREAM and GOAWAY frames to cause a denial of service.
Affected software
Jetty
How to mitigate CVE-2026-12611
Install security update from vendor's website.
Jetty - addressed in versions 9.4.64, 10.0.32, 11.0.32, 12.0.38, 12.1.11