CVE-2026-29146highCWE-1240CWE-209CWE-642

CVE-2026-29146: high-severity vulnerability in Apache Tomcat

Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default

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21Vexday Risk Score

No sign of exploitation. It has an official Brazilian government alert.

ssvc Trackcvss 7.5epss 8.8%
Official alert in Brazil

Brazil's federal government published an alert, recommendation or bulletin that cites this vulnerability.

Source: CTIR Gov (GSI) and CISC Gov.br, under the CC BY-ND 3.0 license.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Apache Software Foundation · Apache Tomcat
Related CVEs — Apache Tomcat

In the same product, most dangerous first.

CVE-2017-12617HIGHCVE-2017-12617EPSS 100.0%KEVCVE-2025-24813CRITICALApache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTEPSS 99.9%KEVCVE-2017-12615HIGHCVE-2017-12615EPSS 99.7%KEVCVE-2026-34486HIGHApache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptorEPSS 98.5%KEVCVE-2016-8735CRITICALCVE-2016-8735EPSS 90.3%KEVCVE-2018-11784—CVE-2018-11784EPSS 97.7%