CVE-2026-79677

tomcat: Apache Tomcat: Denial of Service due to lost asynchronous WebSocket write timeouts

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Severity

Moderate

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · September 23, 2026

Updated · November 4, 2026

Description

A flaw was found in Apache Tomcat. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by exploiting lost timeouts for asynchronous WebSocket writes. This can lead to the affected system becoming unresponsive or unavailable.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime