CVE-2026-24880
Published:April 09, 2026
Updated:April 20, 2026
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.
Affected Packages
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=9.0.0-M1 <9.0.116Fix Suggestion:
Update to version 9.0.116https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=11.0.0-M1 <11.0.20Fix Suggestion:
Update to version 11.0.20https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=10.1.0-M1 <10.1.53Fix Suggestion:
Update to version 10.1.53org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=9.0.0.M1 <9.0.116Fix Suggestion:
Update to version 9.0.116org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.53Fix Suggestion:
Update to version 10.1.53org.apache.tomcat:tomcat-tribes (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.52Fix Suggestion:
Update to version 10.1.52org.apache.tomcat:tomcat-tribes (JAVA):
Affected version(s) >=7.0.0 <9.0.116Fix Suggestion:
Update to version 9.0.116org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.20Fix Suggestion:
Update to version 11.0.20org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.20Fix Suggestion:
Update to version 11.0.20org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.53Fix Suggestion:
Update to version 10.1.53org.apache.tomcat:tomcat-tribes (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.20Fix Suggestion:
Update to version 11.0.20org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=9.0.0.M1 <9.0.116Fix Suggestion:
Update to version 9.0.116Related Resources (14)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
EPSS
Base Score:
0.21
