CVE-2026-29146: Apache Tomcat Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-h468-7pvh-8vr8
Share
CVSS 7.5
CWE-209
Published
Advisory Summary

CVE-2026-29146 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-209: Generation of Error Message Containing Sensitive Information) affecting Apache Tomcat libraries in the Maven ecosystem. The issue involves padding oracle vulnerability in encryptinterceptor. Remediation is available by upgrading affected packages to version 9.0.116, 10.1.53, 11.0.20.

CVE-2026-29146 at a Glance

CVE Identifier CVE-2026-29146
GHSA Identifier GHSA-h468-7pvh-8vr8
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-209: Generation of Error Message Containing Sensitive Information
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-2026-29146

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-tribes fixed: 9.0.116 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-tribes</artifactId>
    <version>9.0.116</version>
</dependency>
org.apache.tomcat:tomcat-tribes fixed: 10.1.53 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-tribes</artifactId>
    <version>10.1.53</version>
</dependency>
org.apache.tomcat:tomcat-tribes fixed: 11.0.20 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-tribes</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:tomcat-tribes fixed: Latest secure release 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-tribes</artifactId>
    <version>Latest secure release</version>
</dependency>
org.apache.tomcat:tomcat fixed: Latest secure release 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>Latest secure release</version>
</dependency>
org.apache.tomcat:tomcat-tribes fixed: Latest secure release 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-tribes</artifactId>
    <version>Latest secure release</version>
</dependency>
org.apache.tomcat:tomcat fixed: Latest secure release 
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>Latest secure release</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-2026-29146, 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-209: Generation of Error Message Containing Sensitive Information, where the product generates an error message that includes sensitive information about its environment, users, or associated data. 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

Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.0.0-M1 through 10.1.52, from 9.0.13 through 9..115, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Users are recommended to upgrade to version 11.0.19, 10.1.53 and 9.0.116, which fixes the issue.

CVE-2026-29146 Affected Apache Tomcat Versions

10 component(s)
Fixed Versions:
9.0.11610.1.5311.0.20
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.tomcat:tomcat-tribes
maven/org.apache.tomcat/tomcat-tribes
Maven
≥ 9.0.13
< 9.0.116
9.0.116
org.apache.tomcat:tomcat-tribes
maven/org.apache.tomcat/tomcat-tribes
Maven
≥ 10.1.50
< 10.1.53
10.1.53
org.apache.tomcat:tomcat-tribes
maven/org.apache.tomcat/tomcat-tribes
Maven
≥ 11.0.0-M1
< 11.0.20
11.0.20
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 9.0.13
< 9.0.116
9.0.116
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 10.1.50
< 10.1.53
10.1.53
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 11.0.0-M1
< 11.0.20
11.0.20
org.apache.tomcat:tomcat-tribes
maven/org.apache.tomcat/tomcat-tribes
Maven
≥ 8.5.38
≤ 8.5.100
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 8.5.38
≤ 8.5.100
org.apache.tomcat:tomcat-tribes
maven/org.apache.tomcat/tomcat-tribes
Maven
≥ 7.0.100
≤ 7.0.109
org.apache.tomcat:tomcat
maven/org.apache.tomcat/tomcat
Maven
≥ 7.0.100
≤ 7.0.109

References

NVD — CVE-2026-29146 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-29146
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/0112ed22abfccc3d54e44d91eb08804d0886acd1
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/607ebc0fa522bd9e8c05517baa2d179bbd1e659c
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/6d955cceca841f2eabf2d6c46b59a8c7e1cd6eaa
Apache Tomcat Source Repository REPOSITORY
https://github.com/apache/tomcat
lists.apache.org/thread/lzt04z2pb3dc... WEB
https://lists.apache.org/thread/lzt04z2pb3dc5tk85obn80xygw3z1p0w
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-2026-29146
Apache Tomcat Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/09/24

Frequently Asked Questions

What is CVE-2026-29146?
CVE-2026-29146 is a security vulnerability in Apache Tomcat involving Padding Oracle vulnerability in EncryptInterceptor under CWE-209: Generation of Error Message Containing Sensitive Information.
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-tribes, org.apache.tomcat:tomcat.
What version fixes CVE-2026-29146?
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-tribes affected?
Yes, org.apache.tomcat:tomcat-tribes is affected in releases prior to 9.0.116, 10.1.53, 11.0.20, Latest secure release. Upgrade your dependency to 9.0.116, 10.1.53, 11.0.20, Latest secure release 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, Latest secure release. Upgrade your dependency to 9.0.116, 10.1.53, 11.0.20, Latest secure release or later.
What is the CVSS score of CVE-2026-29146?
CVE-2026-29146 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-2026-29146?
CVE-2026-29146 is classified under CWE-209: Generation of Error Message Containing Sensitive Information (The product generates an error message that includes sensitive information about its environment, users, or associated data.).
How can I check Maven dependencies for CVE-2026-29146?
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-h468-7pvh-8vr8",
  "modified" : "2026-04-15T21:33:40Z",
  "published" : "2026-04-09T21:31:29Z",
  "aliases" : [ "CVE-2026-29146" ],
  "summary" : "Apache Tomcat: Padding Oracle vulnerability in EncryptInterceptor",
  "details" : "Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.0.0-M1 through 10.1.52, from 9.0.13 through 9..115, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.19, 10.1.53 and 9.0.116, which fixes the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-tribes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.13"
      }, {
        "fixed" : "9.0.116"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-tribes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.1.50"
      }, {
        "fixed" : "10.1.53"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-tribes"
    },
    "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:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.13"
      }, {
        "fixed" : "9.0.116"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.1.50"
      }, {
        "fixed" : "10.1.53"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "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:tomcat-tribes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.5.38"
      }, {
        "last_affected" : "8.5.100"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.5.38"
      }, {
        "last_affected" : "8.5.100"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-tribes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.100"
      }, {
        "last_affected" : "7.0.109"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.100"
      }, {
        "last_affected" : "7.0.109"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-29146"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/0112ed22abfccc3d54e44d91eb08804d0886acd1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/607ebc0fa522bd9e8c05517baa2d179bbd1e659c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/tomcat/commit/6d955cceca841f2eabf2d6c46b59a8c7e1cd6eaa"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/tomcat"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/lzt04z2pb3dc5tk85obn80xygw3z1p0w"
  }, {
    "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-2026-29146"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/09/24"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-209" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-10T21:32:09Z",
    "nvd_published_at" : "2026-04-09T20:16:24Z"
  }
}