Resource Exhaustion Affecting jetty9 package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-ECHOLATEST-JETTY9-19698191
  • published12 Sept 2026
  • disclosed8 Sept 2026

Introduced: 8 Sep 2026

NewCVE-2026-12611  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest jetty9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jetty9 package and not the jetty9 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A client may issue HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive.

This is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client.

The race condition "resets" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads.

CVSS Base Scores

version 3.1