Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 82.9%; technical severity is CVSS 7.5.
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.
Who should care
- Teams operating Tomcat, Enterprise Linux, Enterprise Linux Els +4 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Tomcat, Enterprise Linux, Enterprise Linux Els +4 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Red Hat Security advisory CVE-2026-34486
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-311
- Affected versions
- Apache Tomcat (Version 9.0.116 | Version 10.1.53 | Version 11.0.20); Redhat Enterprise Linux (Version 8.0 | Version 9.0 | Version 10.0); Redhat Enterprise Linux Els (Version 7.0); Redhat Enterprise Linux Eus (Version 10.0); Redhat Enterprise Linux Tus (Version 8.8); Redhat Enterprise Linux Update Services For Sap Solutions (Version 8.8 | Version 9.2 | Version 9.4 | Version 9.6); Redhat Jboss Web Server (Version 7.0.0)
- Fixed versions
- No explicit fixed version is currently recorded.
- Published
- 9 April 2026
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 82.9%
- Signal calculated at 81
External references
- Red Hat Third-party advisory RHSA-2026:36787
- Red Hat Third-party advisory RHSA-2026:36788
- Red Hat Third-party advisory RHSA-2026:36789
- Red Hat Third-party advisory RHSA-2026:36790
- Red Hat Third-party advisory RHSA-2026:36876
- Red Hat Third-party advisory RHSA-2026:36877
- Red Hat Third-party advisory RHSA-2026:36878
- Red Hat Third-party advisory RHSA-2026:36879
- Red Hat Third-party advisory RHSA-2026:37136
- Red Hat Third-party advisory RHSA-2026:37137
- Red Hat Third-party advisory RHSA-2026:38505
- Red Hat Third-party advisory RHSA-2026:39188