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CVE-2026-29146

HighPublished

Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default

Published: Apr 9, 2026
Updated: Aug 17, 2026
Assigning CNA: apache
Evidence observed: Aug 28, 2026

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

8.9%

Low · next 30 days

Percentile: 95.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

cve-2026-34486-tomcat_encrypt_bypass_reproductionPoC
CVE Reproduction: cve-2026-34486-tomcat_encrypt_bypass_reproduction

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