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CVE-2026-24880

HIGH

Apache Tomcat has an HTTP Request/Response Smuggling vulnerability

Published April 9, 2026Updated May 20, 2026Source: osv

Summary

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.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 9.0.116 or later
<!-- Update pom.xml dependency version to 9.0.116 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 10.1.52 or later
<!-- Update pom.xml dependency version to 10.1.52 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 11.0.20 or later
<!-- Update pom.xml dependency version to 11.0.20 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat:tomcat-coyote to 11.0.20 or later
<!-- Update pom.xml dependency version to 11.0.20 for org.apache.tomcat:tomcat-coyote -->
Maven
Update org.apache.tomcat:tomcat-coyote to 10.1.52 or later
<!-- Update pom.xml dependency version to 10.1.52 for org.apache.tomcat:tomcat-coyote -->
Maven
Update org.apache.tomcat:tomcat-coyote to 9.0.116 or later
<!-- Update pom.xml dependency version to 9.0.116 for org.apache.tomcat:tomcat-coyote -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (6)

PackageEcosystemAffectedFixed In
org.apache.tomcat.embed:tomcat-embed-core
maven
7.0.0, 7.0.100, 7.0.103, 7.0.104 (+316 more)9.0.116
org.apache.tomcat.embed:tomcat-embed-core
maven
10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+54 more)10.1.52
org.apache.tomcat.embed:tomcat-embed-core
maven
11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+36 more)11.0.20
org.apache.tomcat:tomcat-coyote
maven
11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+36 more)11.0.20
org.apache.tomcat:tomcat-coyote
maven
10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+54 more)10.1.52
org.apache.tomcat:tomcat-coyote
maven
7.0.0, 7.0.100, 7.0.103, 7.0.104 (+316 more)9.0.116

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

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

References

Frequently Asked Questions

What is CVE-2026-24880?
Apache Tomcat has an HTTP Request/Response Smuggling vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2026-24880?
CVE-2026-24880 affects org.apache.tomcat.embed:tomcat-embed-core and org.apache.tomcat:tomcat-coyote. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-24880 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-563x-q5rq-57qp
BIT-tomcat-2026-24880

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