Missing Release of Resource after Effective Lifetime Affecting org.apache.tomcat.embed:tomcat-embed-websocket package, versions [11.0.0-M1, 11.0.26)[10.1.0-M1, 10.1.60)[9.0.0.M1, 9.0.122)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGAPACHETOMCATEMBED-21246252
- published19 Oct 2026
- disclosed23 Sept 2026
- creditUnknown
Introduced: 23 Sep 2026
CVE-2026-79677 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat.embed:tomcat-embed-websocket to version 11.0.26, 10.1.60, 9.0.122 or higher.
Overview
Affected versions of this package are vulnerable to Missing Release of Resource after Effective Lifetime through the WebSocket write timeout handling in org.apache.tomcat.websocket.WsRemoteEndpointImplBase, WsRemoteEndpointImplClient, WsRemoteEndpointImplServer, and MessagePart. An attacker can keep asynchronous WebSocket sends from timing out by sending message fragments or consecutive writes that reuse the same timeout, causing the timeout state to be lost during write processing. When this happens, the server can keep waiting on stalled WebSocket writes instead of aborting them, tying up resources and eventually preventing the application from serving other requests.