CVE-2026-29146

Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default

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.

Affected

Apache Software Foundation · Apache Tomcat

CVSS v4.0 GitHub

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS v3.1 CNA

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

EPSS

2.89% chance of exploitation in the next 30 days, 87th percentile

Published

2026-04-09

Updated

2026-08-17

Proof-of-concept exploits (1)

• AirSkye/CVE-2026-34486-poc12★ · 2026-04-15

Security advisories

• https://lists.apache.org/thread/lzt04z2pb3dc5tk85obn80xygw3z1p0w
• http://www.openwall.com/lists/oss-security/2026/04/09/24
• advisories/GHSA-h468-7pvh-8vr8

References

• CVE Record
• NVD entry

Related

• CVE-2026-34486