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Servers and applications

CVE-2026-34486

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 4 Aug 2026.

Severity
High 7.5
Published
9 Apr 2026
Last changed
21 Sept 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • Version 9.0.116
  • Version 10.1.53
  • Version 11.0.20

Known exploited

CISA name
Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
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…
Due for US agencies
7 Aug 2026
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-34486
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34486