CVE-2026-29146
Padding Oracle Vulnerability in Apache Tomcat EncryptInterceptor
Publication date: 2026-04-09
Last updated on: 2026-04-14
Assigner: Apache Software Foundation
Description
Description
CVSS Scores
EPSS Scores
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| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apache | tomcat | From 11.0.0 (inc) to 11.0.20 (exc) |
| apache | tomcat | From 9.0.13 (inc) to 9.0.116 (exc) |
| apache | tomcat | From 10.0.0 (inc) to 10.1.53 (exc) |
| apache | tomcat | From 7.0.100 (inc) to 7.0.109 (inc) |
| apache | tomcat | From 8.5.38 (inc) to 8.5.100 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-209 | The product generates an error message that includes sensitive information about its environment, users, or associated data. |
| CWE-642 | The product stores security-critical state information about its users, or the product itself, in a location that is accessible to unauthorized actors. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify how the Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor affects compliance with common standards and regulations such as GDPR or HIPAA.
Can you explain this vulnerability to me?
This vulnerability is a Padding Oracle issue found in Apache Tomcat's EncryptInterceptor when used with its default configuration. A Padding Oracle vulnerability allows an attacker to decrypt encrypted data by exploiting the way padding errors are handled during decryption.
How can this vulnerability impact me? :
The vulnerability could allow an attacker to decrypt sensitive information that is supposed to be protected by encryption within Apache Tomcat. This could lead to unauthorized access to confidential data or compromise the security of applications relying on Tomcat's encryption.
What immediate steps should I take to mitigate this vulnerability?
Users are recommended to upgrade Apache Tomcat to versions 11.0.19, 10.1.53, or 9.0.116, which contain fixes for this Padding Oracle vulnerability in the EncryptInterceptor.