CVE-2026-29146

7.5

HIGH CVSS 3.1

Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default

Overview

Description

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.

Details

INFO

Published Date :

April 9, 2026, 8:16 p.m.

Last Modified :

April 14, 2026, 12:56 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]

Impact

Affected Products

The following products are affected by CVE-2026-29146 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Apache	tomcat

: Total Affected Vendor : 1 | Products : 1

Scoring

CVSS Scores

The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.

Score	Version	Severity	Vector	Exploitability Score	Impact Score	Source
	CVSS 3.1	HIGH				134c704f-9b21-4f2e-91b3-4a467353bcc0

Solution

Upgrade Apache Tomcat to a patched version to fix the Padding Oracle vulnerability.

Upgrade Apache Tomcat to version 11.0.19.
Upgrade Apache Tomcat to version 10.1.53.
Upgrade Apache Tomcat to version 9.0.116.

Public PoC/Exploit Available at Github

CVE-2026-29146 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-29146.

URL	Resource
https://lists.apache.org/thread/lzt04z2pb3dc5tk85obn80xygw3z1p0w	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/09/24	Mailing List Third Party Advisory

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-29146 is associated with the following CWEs:

CWE-209: Generation of Error Message Containing Sensitive Information

CWE-642: External Control of Critical State Data

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-29146 weaknesses.

CAPEC-7: Blind SQL Injection Blind SQL Injection CAPEC-54: Query System for Information Query System for Information CAPEC-215: Fuzzing for application mapping Fuzzing for application mapping CAPEC-463: Padding Oracle Crypto Attack Padding Oracle Crypto Attack CAPEC-21: Exploitation of Trusted Identifiers Exploitation of Trusted Identifiers CAPEC-31: Accessing/Intercepting/Modifying HTTP Cookies Accessing/Intercepting/Modifying HTTP Cookies

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

AirSkye/CVE-2026-34486-poc

CVE-2026-34486 Apache Tomcat EncryptInterceptor 绕过漏洞复现（使用GLM5.1复现完成）

Shell

Updated: 1 week, 6 days ago

7 stars 0 fork 0 watcher

Born at : April 15, 2026, 7:30 a.m. This repo has been linked 2 different CVEs too.

nomi-sec/PoC-in-GitHub

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 5 days, 8 hours ago

7667 stars 1247 fork 1247 watcher

Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 749 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-29146 vulnerability anywhere in the article.

CybersecurityNews

Apache Tomcat Vulnerabilities Enables Bypass of EncryptInterceptor

The Apache Software Foundation has released emergency security updates to address multiple vulnerabilities in Apache Tomcat. The latest advisories highlight a critical patching error that inadvertentl ...

Published Date: Apr 13, 2026 (2 weeks, 3 days ago)

Daily CyberSecurity

Encryption Bypasses and Kubernetes Token Leaks Hit Apache Tomcat

Apache Tomcat, the open-source backbone for millions of Java-based web applications, has been hit by a wave of security disclosures. A comprehensive audit has revealed ten distinct vulnerabilities aff ...

Published Date: Apr 13, 2026 (2 weeks, 3 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-29146 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

Initial Analysis by [email protected]

Apr. 14, 2026

Action	Type	New Value
Added	CPE Configuration	OR cpe:2.3:a:apache:tomcat::::::::* versions from (including) 11.0.0 up to (excluding) 11.0.20 cpe:2.3:a:apache:tomcat::::::::* versions from (including) 9.0.13 up to (excluding) 9.0.116 cpe:2.3:a:apache:tomcat::::::::* versions from (including) 10.0.0 up to (excluding) 10.1.53 cpe:2.3:a:apache:tomcat::::::::* versions from (including) 7.0.100 up to (including) 7.0.109 cpe:2.3:a:apache:tomcat::::::::* versions from (including) 8.5.38 up to (including) 8.5.100
Added	Reference Type	CVE: http://www.openwall.com/lists/oss-security/2026/04/09/24 Types: Mailing List, Third Party Advisory
Added	Reference Type	Apache Software Foundation: https://lists.apache.org/thread/lzt04z2pb3dc5tk85obn80xygw3z1p0w Types: Mailing List, Vendor Advisory

CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

Apr. 10, 2026

Action	Type	New Value
Added	CVSS V3.1	AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Added	CWE	CWE-642
Added	CWE	CWE-209

CVE Modified by af854a3a-2127-422b-91ae-364da2661108