CVE-2026-24880: Apache Tomcat Apache Tomcat Has An HTTP Vulnerability

HIGH
Advisory Identifier: GHSA-563x-q5rq-57qp
Share
CVSS 7.5
CWE-444
Published
Advisory Summary

CVE-2026-24880 is a HIGH (CVSS 7.5) apache tomcat has an http vulnerability (CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')) affecting Apache Tomcat libraries in the Maven ecosystem. The issue involves apache tomcat has an http request/response smuggling vulnerability. Remediation is available by upgrading affected packages to version 9.0.116, 10.1.52, 11.0.20.

CVE-2026-24880 at a Glance

CVE Identifier CVE-2026-24880
GHSA Identifier GHSA-563x-q5rq-57qp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected Product Apache Tomcat
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-24880

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.

org.apache.tomcat:tomcat-coyote fixed: 9.0.116 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-coyote</artifactId>
    <version>9.0.116</version>
</dependency>
org.apache.tomcat:tomcat-coyote fixed: 10.1.52 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-coyote</artifactId>
    <version>10.1.52</version>
</dependency>
org.apache.tomcat:tomcat-coyote fixed: 11.0.20 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-coyote</artifactId>
    <version>11.0.20</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 9.0.116 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>9.0.116</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 10.1.52 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>10.1.52</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 11.0.20 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>11.0.20</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.apache.tomcat

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-24880, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.tomcat

Analyze 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 9.0.116), 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-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'), where the product acts as an intermediary http agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed http requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. 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

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.

CVE-2026-24880 Affected Apache Tomcat Versions

6 component(s)
Fixed Versions:
9.0.11610.1.5211.0.20
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.tomcat:tomcat-coyote
maven/org.apache.tomcat/tomcat-coyote
Maven
≥ 7.0.0
< 9.0.116
9.0.116
org.apache.tomcat:tomcat-coyote
maven/org.apache.tomcat/tomcat-coyote
Maven
≥ 10.1.0-M1
< 10.1.52
10.1.52
org.apache.tomcat:tomcat-coyote
maven/org.apache.tomcat/tomcat-coyote
Maven
≥ 11.0.0-M1
< 11.0.20
11.0.20
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 7.0.0
< 9.0.116
9.0.116
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 10.1.0-M1
< 10.1.52
10.1.52
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 11.0.0-M1
< 11.0.20
11.0.20

References

NVD — CVE-2026-24880 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-24880
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/1b586d6aa8ae65726da5fa8799427b5d4718478a
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/1e71441a15972f56e661b0b549fb9e5d838b83bb
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/2cb06c34f661ca42f7570bbcc21e99806184bcc5
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/6d478dbe18b7c4bb671c30fedf130309b0dab77c
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/f07df938d00f7419b40fa65aa912966d0efac522
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/fde1a8235fb73125217bd41e162aa0a113f33552
Apache Tomcat Source Repository REPOSITORY
https://github.com/apache/tomcat
lists.apache.org/thread/2c682qnlg2tv... WEB
https://lists.apache.org/thread/2c682qnlg2tv4o5knlggqbl9yc2gb5sn
Apache Tomcat Security Information SECURITY
https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.53
Apache Tomcat Security Information SECURITY
https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.20
Apache Tomcat Security Information SECURITY
https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.116
www.herodevs.com/vulnerability-direc... WEB
https://www.herodevs.com/vulnerability-directory/cve-2026-24880
Apache Tomcat Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/09/20

Frequently Asked Questions

What is CVE-2026-24880?
CVE-2026-24880 is a security vulnerability in Apache Tomcat involving Apache Tomcat has an HTTP Request/Response Smuggling vulnerability under CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling').
Which Apache Tomcat versions are affected?
Affected versions include releases prior to 9.0.116, 10.1.52, 11.0.20 across affected packages: org.apache.tomcat:tomcat-coyote, org.apache.tomcat.embed:tomcat-embed-core.
What version fixes CVE-2026-24880?
Upgrading to 9.0.116, 10.1.52, 11.0.20 (or the latest patched release for your respective branch) resolves the vulnerability.
Is tomcat-coyote affected?
Yes, org.apache.tomcat:tomcat-coyote is affected in releases prior to 9.0.116, 10.1.52, 11.0.20. Upgrade your dependency to 9.0.116, 10.1.52, 11.0.20 or later.
Is tomcat-embed-core affected?
Yes, org.apache.tomcat.embed:tomcat-embed-core is affected in releases prior to 9.0.116, 10.1.52, 11.0.20. Upgrade your dependency to 9.0.116, 10.1.52, 11.0.20 or later.
What is the CVSS score of CVE-2026-24880?
CVE-2026-24880 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2026-24880?
CVE-2026-24880 is classified under CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') (The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.).
How can I check Maven dependencies for CVE-2026-24880?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.tomcat'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-563x-q5rq-57qp",
  "modified" : "2026-05-20T21:54:29Z",
  "published" : "2026-04-09T21:31:29Z",
  "aliases" : [ "CVE-2026-24880" ],
  "summary" : "Apache Tomcat has an HTTP Request/Response Smuggling vulnerability",
  "details" : "Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension.\n\nThis 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.\nOther, unsupported versions may also be affected.\n\nUsers are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-coyote"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "9.0.116"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-coyote"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.1.0-M1"
      }, {
        "fixed" : "10.1.52"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-coyote"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "11.0.0-M1"
      }, {
        "fixed" : "11.0.20"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 11.0.18"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "9.0.116"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.1.0-M1"
      }, {
        "fixed" : "10.1.52"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "11.0.0-M1"
      }, {
        "fixed" : "11.0.20"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 11.0.18"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-24880"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/1b586d6aa8ae65726da5fa8799427b5d4718478a"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/1e71441a15972f56e661b0b549fb9e5d838b83bb"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/2cb06c34f661ca42f7570bbcc21e99806184bcc5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/6d478dbe18b7c4bb671c30fedf130309b0dab77c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/f07df938d00f7419b40fa65aa912966d0efac522"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/fde1a8235fb73125217bd41e162aa0a113f33552"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/tomcat"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/2c682qnlg2tv4o5knlggqbl9yc2gb5sn"
  }, {
    "type" : "WEB",
    "url" : "https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.53"
  }, {
    "type" : "WEB",
    "url" : "https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.20"
  }, {
    "type" : "WEB",
    "url" : "https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.116"
  }, {
    "type" : "WEB",
    "url" : "https://www.herodevs.com/vulnerability-directory/cve-2026-24880"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/09/20"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-444" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-10T22:07:01Z",
    "nvd_published_at" : "2026-04-09T20:16:24Z"
  }
}