CVE-2026-24880
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Tomcat
PublishedApr 9, 2026
First seenApr 9, 2026
Weakness typeCWE-444CWE-444
How to fix
Update
- apache tomcat9.0.116, 10.1.53, 11.0.20 or later
- org.apache.tomcat:tomcat-coyote9.0.116, 10.1.52, 11.0.20 or later
- org.apache.tomcat.embed:tomcat-embed-core9.0.116, 10.1.52, 11.0.20 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache tomcat | 9.0.0 ≤ v < 9.0.116, 10.1.0 ≤ v < 10.1.53, 11.0.0 ≤ v < 11.0.20 | 9.0.116, 10.1.53, 11.0.20 |
| org.apache.tomcat:tomcat-coyoteMaven | 7.0.0 ≤ v < 9.0.116, 10.1.0-M1 ≤ v < 10.1.52, 11.0.0-M1 ≤ v < 11.0.20 | 9.0.116, 10.1.52, 11.0.20 |
| org.apache.tomcat.embed:tomcat-embed-coreMaven | 7.0.0 ≤ v < 9.0.116, 10.1.0-M1 ≤ v < 10.1.52, 11.0.0-M1 ≤ v < 11.0.20 | 9.0.116, 10.1.52, 11.0.20 |
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