CVE-2026-24733: Apache Tomcat Apache Tomcat - Security Constraint Vulnerability
LOWCVE-2026-24733 is a LOW apache tomcat - security constraint vulnerability (CWE-20: Improper Input Validation) affecting Apache Tomcat libraries in the Maven ecosystem. The issue involves apache tomcat - security constraint bypass with http/0.9. Remediation is available by upgrading affected packages to version 11.0.15, 10.1.50, 9.0.113.
CVE-2026-24733 at a Glance
How to Fix CVE-2026-24733
To remediate this vulnerability, upgrade all affected Apache Tomcat dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-coyote</artifactId>
<version>11.0.15</version>
</dependency><dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-coyote</artifactId>
<version>10.1.50</version>
</dependency><dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-coyote</artifactId>
<version>9.0.113</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.apache.tomcatHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-24733, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.apache.tomcatAnalyze the terminal output to locate any version of Apache Tomcat in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 11.0.15), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.apache.tomcat command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Apache Tomcat, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-24733 Affected Apache Tomcat Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.apache.tomcat:tomcat-coyote
|
Maven |
≥ 11.0.0-M1
< 11.0.15
|
11.0.15
|
|
org.apache.tomcat:tomcat-coyote
|
Maven |
≥ 10.1.0-M1
< 10.1.50
|
10.1.50
|
|
org.apache.tomcat:tomcat-coyote
|
Maven |
< 9.0.113
|
9.0.113
|
References
Frequently Asked Questions
What is CVE-2026-24733?
Which Apache Tomcat versions are affected?
What version fixes CVE-2026-24733?
Is tomcat-coyote affected?
What CWE is associated with CVE-2026-24733?
How can I check Maven dependencies for CVE-2026-24733?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-qq5r-98hh-rxc9",
"modified" : "2026-06-29T20:37:29Z",
"published" : "2026-02-17T21:31:13Z",
"aliases" : [ "CVE-2026-24733" ],
"summary" : "Apache Tomcat - Security constraint bypass with HTTP/0.9",
"details" : "Improper Input Validation vulnerability in Apache Tomcat.\n\nTomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112.\n\n\nOlder, EOL versions are also affected.\n\nUsers are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.apache.tomcat:tomcat-coyote"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "11.0.0-M1"
}, {
"fixed" : "11.0.15"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.apache.tomcat:tomcat-coyote"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.1.0-M1"
}, {
"fixed" : "10.1.50"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.apache.tomcat:tomcat-coyote"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "9.0.113"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-24733"
}, {
"type" : "WEB",
"url" : "https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f"
}, {
"type" : "WEB",
"url" : "https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b"
}, {
"type" : "WEB",
"url" : "https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/apache/tomcat"
}, {
"type" : "WEB",
"url" : "https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f"
}, {
"type" : "WEB",
"url" : "https://tomcat.apache.org/security-10.html"
}, {
"type" : "WEB",
"url" : "https://tomcat.apache.org/security-11.html"
}, {
"type" : "WEB",
"url" : "https://tomcat.apache.org/security-9.html"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-20" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2026-02-19T15:06:26Z",
"nvd_published_at" : "2026-02-17T19:21:56Z"
}
}