This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-77791 →

DEBIAN-CVE-2026-77791

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

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 tomcat10

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 tomcat10

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 tomcat10

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.1.60-1"}]}]

Debian:13 tomcat11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 tomcat11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:12 tomcat9

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.70-2"}]}]

Debian:13 tomcat9

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.70-2"}]}]

Debian:14 tomcat9

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.70-2"}]}]

References

advisory security-tracker.debian.org