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CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
CVE-2026-34486: high vulnerability affecting Tomcat. Check CVSS, KEV status, business impact and recommended administrator actions.
- CVSS
- 7.5 HIGH
- EPSS
- 99.92%
- Known exploited
- yes
- Product
- Tomcat
What is known
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.
Business impact
Successful exploitation of CVE-2026-34486, a high vulnerability (CVSS 7.5) affecting Tomcat, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration. CISA lists this vulnerability in the Known Exploited Vulnerabilities catalog, so exposed systems should be treated as a priority.
Recommended administrator action
Confirm whether Tomcat is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. Where applicable, include the CISA KEV remediation due date of 2026-08-07 in the change plan. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.