CVE-2026-24880

Apache Tomcat: Request smuggling via invalid chunk extension

State: Published
Severity: 7.5 High
Published: Apr 9, 2026
Updated: Apr 10, 2026
Reserved: Jan 27, 2026

Description

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	CISA-ADP

Weaknesses

CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Affected Products

Product	Versions
Apache TomcatApache Software Foundation	11.0.0-M1 through 11.0.18Affected 10.1.0-M1 through 10.1.52Affected 9.0.0.M1 through 9.0.115Affected 8.5.0 through 8.5.100Affected 7.0.0 through 7.0.109Affected before 7.0.0Unknown 8.0.0-RC1 through 8.0.53Unknown

References

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