CVE-2026-29129: Apache Tomcat Configured Cipher Preference Order Not Vulnerability

HIGH
Advisory Identifier: GHSA-69cc-cv78-qc8g
Share
CVSS 7.5
CWE-327
Published
Advisory Summary

CVE-2026-29129 is a HIGH (CVSS 7.5) configured cipher preference order not vulnerability (CWE-327: Use of a Broken or Risky Cryptographic Algorithm) affecting Apache Tomcat libraries in the Maven ecosystem. The issue involves configured cipher preference order not preserved. Remediation is available by upgrading affected packages to version 9.0.116, 10.1.53, 11.0.20.

CVE-2026-29129 at a Glance

CVE Identifier CVE-2026-29129
GHSA Identifier GHSA-69cc-cv78-qc8g
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-327: Use of a Broken or Risky Cryptographic Algorithm
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:H/I:N/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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-29129

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: 10.1.53 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-coyote</artifactId>
    <version>10.1.53</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:tomcat fixed: 9.0.116 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>9.0.116</version>
</dependency>
org.apache.tomcat:tomcat fixed: 10.1.53 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>10.1.53</version>
</dependency>
org.apache.tomcat:tomcat fixed: 11.0.20 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</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: 10.1.53 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>10.1.53</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-2026-29129, 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-327: Use of a Broken or Risky Cryptographic Algorithm, where the product uses a broken or risky cryptographic algorithm or protocol. 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

Configured cipher preference order not preserved vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.16 through 11.0.18, from 10.1.51 through 10.1.52, from 9.0.114 through 9.0.115. Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.

CVE-2026-29129 Affected Apache Tomcat Versions

9 component(s)
Fixed Versions:
9.0.11610.1.5311.0.20
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.tomcat:tomcat-coyote
maven/org.apache.tomcat/tomcat-coyote
Maven
≥ 9.0.114
< 9.0.116
9.0.116
org.apache.tomcat:tomcat-coyote
maven/org.apache.tomcat/tomcat-coyote
Maven
≥ 10.1.51
< 10.1.53
10.1.53
org.apache.tomcat:tomcat-coyote
maven/org.apache.tomcat/tomcat-coyote
Maven
≥ 11.0.16
< 11.0.20
11.0.20
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 9.0.114
< 9.0.116
9.0.116
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 10.1.51
< 10.1.53
10.1.53
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 11.0.16
< 11.0.20
11.0.20
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 9.0.114
< 9.0.116
9.0.116
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 10.1.51
< 10.1.53
10.1.53
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 11.0.16
< 11.0.20
11.0.20

References

NVD — CVE-2026-29129 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-29129
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/5cfa876d73f1ff5f4dc8309c4320f684cbeff74e
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/6db238562ec36ab1106db4d04843f8b33e7a0c06
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/8d69b33764dba81dce89e3a768de6093a35620ae
Apache Tomcat Source Repository REPOSITORY
https://github.com/apache/tomcat
lists.apache.org/thread/r4h1t6f8xhxs... WEB
https://lists.apache.org/thread/r4h1t6f8xhxsxfm6c2z5cprolsosho3f
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
Apache Tomcat Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/09/22

Frequently Asked Questions

What is CVE-2026-29129?
CVE-2026-29129 is a security vulnerability in Apache Tomcat involving Configured cipher preference order not preserved under CWE-327: Use of a Broken or Risky Cryptographic Algorithm.
Which Apache Tomcat versions are affected?
Affected versions include releases prior to 9.0.116, 10.1.53, 11.0.20 across affected packages: org.apache.tomcat:tomcat-coyote, org.apache.tomcat:tomcat, org.apache.tomcat.embed:tomcat-embed-core.
What version fixes CVE-2026-29129?
Upgrading to 9.0.116, 10.1.53, 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, 10.1.53, 11.0.20. Upgrade your dependency to 9.0.116, 10.1.53, 11.0.20 or later.
Is tomcat affected?
Yes, org.apache.tomcat:tomcat is affected in releases prior to 9.0.116, 10.1.53, 11.0.20. Upgrade your dependency to 9.0.116, 10.1.53, 11.0.20 or later.
What is the CVSS score of CVE-2026-29129?
CVE-2026-29129 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:H/I:N/A:N.
What CWE is associated with CVE-2026-29129?
CVE-2026-29129 is classified under CWE-327: Use of a Broken or Risky Cryptographic Algorithm (The product uses a broken or risky cryptographic algorithm or protocol.).
How can I check Maven dependencies for CVE-2026-29129?
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 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-69cc-cv78-qc8g",
  "modified" : "2026-05-20T22:14:28Z",
  "published" : "2026-04-09T21:31:29Z",
  "aliases" : [ "CVE-2026-29129" ],
  "summary" : "Apache Tomcat: Configured cipher preference order not preserved",
  "details" : "Configured cipher preference order not preserved vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.16 through 11.0.18, from 10.1.51 through 10.1.52, from 9.0.114 through 9.0.115.\n\nUsers are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
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  } ],
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    },
    "ranges" : [ {
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  }, {
    "package" : {
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
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      }, {
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      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
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  }, {
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    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-29129"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/5cfa876d73f1ff5f4dc8309c4320f684cbeff74e"
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    "url" : "https://github.com/apache/tomcat/commit/6db238562ec36ab1106db4d04843f8b33e7a0c06"
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    "url" : "https://github.com/apache/tomcat/commit/8d69b33764dba81dce89e3a768de6093a35620ae"
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    "url" : "https://github.com/apache/tomcat"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/r4h1t6f8xhxsxfm6c2z5cprolsosho3f"
  }, {
    "type" : "WEB",
    "url" : "https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.53"
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  }, {
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  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/09/22"
  } ],
  "database_specific" : {
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    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-10T22:07:11Z",
    "nvd_published_at" : "2026-04-09T20:16:24Z"
  }
}