HIGH 7.5 NVD

CVE-2026-87022

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

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.

References

https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w

Published: 2026-09-23 · Source: NVD · Feed updated: 2026-09-23

This high severity vulnerability with a CVSS score of 7.5 was published on 2026-09-23 via NVD.

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