Actively exploited in the wild
Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
Apache - Tomcat · Listed in the CISA KEV since 2026-08-04. This indicates confirmed attacks in production environments.
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.
CVE-2026-34486
HighCVSS 7.5KEVExploitation Probability (EPSS)
Very high risk100th percentile - higher than 100% of all known CVEs
Summary
A missing encryption of sensitive data vulnerability was found in Apache Tomcat due to the fix for CVE-2026-29146 allowing bypass of the EncryptInterceptor. Affected versions: 11.0.20, 10.1.53, and 9.0.116.
Risk Assessment
An attacker could intercept or read sensitive data transmitted between Tomcat servers, leading to a breach of confidentiality and integrity of communications.
Recommendation
Immediately upgrade Apache Tomcat to version 11.0.21, 10.1.54, or 9.0.117, which fix this vulnerability.
Original NVD description (English source)
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.