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CVE-2026-34486

High 7.5 Exploited in the wild (KEV)

Confirmed active exploitation — CISA KEV catalog

Name
Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
Added to catalog
Remediation due date (US federal)
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Description

Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor. This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.

Metrics

CVSS 3.1
7.5 (HIGH) Score source: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS — exploit probability
99% (percentile: 100) as of 1 November 2026
CWE
CWE-311, CWE-807

Affected products

apache: tomcat; redhat: jboss web server; redhat: enterprise linux; redhat: enterprise linux els; redhat: enterprise linux eus; redhat: enterprise linux tus; redhat: enterprise linux update services for sap solutions

References