7.5

CVE-2026-77791

Medienbericht

Apache Tomcat: DoS via busy wait during WebSocket close

Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack.



This issue affects Apache Tomcat: from 11.0.0-M5 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121.



The following versions were EOL at the time the CVE was created but are 
known to be affected: from 8.5.88 through 8.5.100. Other unsupported versions may also be affected.




Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerApache Software Foundation
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Produkt Apache Tomcat
Default Statusunaffected
Version <= 11.0.25
Version 11.0.0-M5
Status affected
Version <= 10.1.59
Version 10.1.8
Status affected
Version <= 9.0.121
Version 9.0.74
Status affected
Version <= 8.5.100
Version 8.5.88
Status affected
Version <= 7.0.109
Version 0
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.53% 0.424
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

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Media Report
05.10.2026 17:13
https://lists.apache.org/thread/mb1pjjooqytrl6hbvbt3rw1lqwlon4cz
http://www.openwall.com/lists/oss-security/2026/09/23/24