Home/CVE/Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration. This issue affects Apach
CVE

CVE-2026-29146

Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration. This issue affects Apach

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.

HIGH · CVSS 7.5 EPSS 0.12919
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 6% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-209Generation of Error Message Containing Sensitive Information
CWE-642External Control of Critical State Data
▤

Affected Products & Versions

5
apache tomcat>= 7.0.100 and <= 7.0.109
apache tomcat>= 8.5.38 and <= 8.5.100
apache tomcat>= 9.0.13 and < 9.0.116
apache tomcat>= 10.0.0 and < 10.1.53
apache tomcat>= 11.0.0 and < 11.0.20
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.apache.tomcat:tomcat HIGH fixed in 9.0.116
Maven org.apache.tomcat:tomcat-tribes HIGH fixed in 9.0.116
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumTomcat WebServer Logs Deleted
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@apache.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Apr 2026 · 08:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

15
rhsaRHSA-2026:20405Important
rhsaRHSA-2026:20406Important
suse-csafSUSE-SU-2026:1603-1
suse-csafSUSE-SU-2026:1604-1
suse-csafSUSE-SU-2026:1572-1
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.apache.org/thread/lzt04z2pb3dc5tk85obn80xygw3z1p0wMailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/09/24Mailing ListThird Party Advisory
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