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Message-ID: <fe8a4819-65ee-49f8-b853-fbf5edc5dde7@apache.org>
Date: Thu, 9 Apr 2026 20:46:58 +0100
From: Mark Thomas <markt@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-24880: Apache Tomcat: Request smuggling via invalid chunk
extension
Severity: low
Affected versions:
- Apache Tomcat 11.0.0-M1 through 11.0.18
- Apache Tomcat 10.1.0-M1 through 10.1.52
- Apache Tomcat 9.0.0.M1 through 9.0.115
- Apache Tomcat 8.5.0 through 8.5.100
- Apache Tomcat 7.0.0 through 7.0.109
- Apache Tomcat before 7.0.0 unknown
- Apache Tomcat 8.0.0-RC1 through 8.0.53 unknown
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.
Credit:
Xclow3n (finder)
References:
https://lists.apache.org/thread/2c682qnlg2tv4o5knlggqbl9yc2gb5sn
https://tomcat.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-24880
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