This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-87022 →

DEBIAN-CVE-2026-87022

Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used...

Original description

The description as published by the source.

Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, 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