Apache Tomcat: Invalid CRL configuration doesn't trigger failure for FFM Connector (CVE-2026-53434)
Apache Tomcat versions 9.0.83 through 9.0.118, 10.1.0 through 10.1.55, and 11.0.0 through 11.0.22 contain a vulnerability where invalid Certificate Revocation List (CRL) configurations for FFM-based connectors do not trigger failure conditions as expected. This detection failure can lead to improper handling of revoked certificates. The issue is fixed in Apache Tomcat versions 9.0.119, 10.1.56, and 11.0.23.
AI Analysis
Technical Summary
CVE-2026-53434 is a vulnerability in Apache Tomcat affecting versions 9.0.83 through 9.0.118, 10.1.0 through 10.1.55, and 11.0.0 through 11.0.22. The flaw involves the failure to trigger an error condition when an invalid CRL configuration is used for an FFM-based connector. This means that Tomcat does not properly handle error states related to CRL validation, potentially allowing revoked certificates to be accepted. The vulnerability is resolved by upgrading to versions 9.0.119, 10.1.56, or 11.0.23.
Potential Impact
The vulnerability may allow Apache Tomcat to accept revoked certificates due to the failure to detect invalid CRL configurations, potentially undermining the security of TLS connections that rely on certificate revocation checks. This could weaken trust in secure communications handled by affected Tomcat instances.
Mitigation Recommendations
A patch is available that fixes this issue. Users should upgrade Apache Tomcat to versions 9.0.119, 10.1.56, or 11.0.23 or later to remediate this vulnerability.
Apache Tomcat: Invalid CRL configuration doesn't trigger failure for FFM Connector (CVE-2026-53434)
Description
Apache Tomcat versions 9.0.83 through 9.0.118, 10.1.0 through 10.1.55, and 11.0.0 through 11.0.22 contain a vulnerability where invalid Certificate Revocation List (CRL) configurations for FFM-based connectors do not trigger failure conditions as expected. This detection failure can lead to improper handling of revoked certificates. The issue is fixed in Apache Tomcat versions 9.0.119, 10.1.56, and 11.0.23.
Affected software
pkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/[email protected]+esm2?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-apps-legacy/xenialpkg:deb/ubuntu/[email protected]+esm8?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/[email protected]~esm4?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]~26.04.1?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]~26.04.1?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]~26.04.1?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-53434 is a vulnerability in Apache Tomcat affecting versions 9.0.83 through 9.0.118, 10.1.0 through 10.1.55, and 11.0.0 through 11.0.22. The flaw involves the failure to trigger an error condition when an invalid CRL configuration is used for an FFM-based connector. This means that Tomcat does not properly handle error states related to CRL validation, potentially allowing revoked certificates to be accepted. The vulnerability is resolved by upgrading to versions 9.0.119, 10.1.56, or 11.0.23.
Potential Impact
The vulnerability may allow Apache Tomcat to accept revoked certificates due to the failure to detect invalid CRL configurations, potentially undermining the security of TLS connections that rely on certificate revocation checks. This could weaken trust in secure communications handled by affected Tomcat instances.
Mitigation Recommendations
A patch is available that fixes this issue. Users should upgrade Apache Tomcat to versions 9.0.119, 10.1.56, or 11.0.23 or later to remediate this vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53434
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a58b47c68715ace43d9e9f9
Added to database: 07/16/2026, 10:37:48 UTC
Last enriched: 09/08/2026, 15:03:20 UTC
Last updated: 09/14/2026, 22:01:35 UTC
Views: 25
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