{"id":"CVE-2026-87022","published":"2026-09-23T12:17:08.640","lastModified":"2026-09-23T19:19:42.183","description":"Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.\n\n\n\nThis 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.\n\n\n\nThe 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.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-130"],"vendors":[],"products":[],"references":[{"url":"https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/23/30","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}