cve-2026-87022
HIGH CVSS 7.5 cvelistv5
Description
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.
Timeline
- Published
- 2026-09-23 11:32 UTC
- Last Modified
- 2026-09-23
CVSS Details
- Attack Vector
- NETWORK
- Attack Complexity
- LOW
- Privileges Required
- NONE
Affected Products
- Apache Software Foundation Apache Tomcat
Weaknesses (CWE)
SSVC (CISA Stakeholder-Specific Vulnerability Categorization)
CISA Coordinator
v2.0.3
- Exploitation
none- Automatable
yes- Technical Impact
partial- Decision timestamp
2026-09-23T14:27:17.688403Z
What is SSVC? — CISA's vulnerability-prioritisation framework using a decision tree rather than a single score.
References
Linked Vulnerabilities
No linked vulnerabilities found.
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