CVE-2026-24880

HIGH

Apache Tomcat: Request smuggling via invalid chunk extension

Title source: cna

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.

References (2)

[Mailing List] http://www.openwall.com/lists/oss-security/2026/04/09/20

[Vendor Advisory] https://lists.apache.org/thread/2c682qnlg2tv4o5knlggqbl9yc2gb5sn

Scores

CVSS v3 7.5

EPSS 0.0022

EPSS Percentile 43.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-444

Status published

Products (12)

apache/tomcat 9.0.0 - 9.0.116

Apache Software Foundation/Apache Tomcat < 7.0.0

Apache Software Foundation/Apache Tomcat 10.1.0-M1 - 10.1.52

Apache Software Foundation/Apache Tomcat 11.0.0-M1 - 11.0.18

Apache Software Foundation/Apache Tomcat 7.0.0 - 7.0.109

Apache Software Foundation/Apache Tomcat 8.0.0-RC1 - 8.0.53

Apache Software Foundation/Apache Tomcat 8.5.0 - 8.5.100

Apache Software Foundation/Apache Tomcat 9.0.0.M1 - 9.0.115

org.apache.tomcat/tomcat 7.0.0 - 9.0.116Maven

org.apache.tomcat/tomcat-catalina 7.0.0 - 9.0.116Maven

... and 2 more

Published Apr 09, 2026

Tracked Since Apr 10, 2026