All vulnerabilities
CVE-2026-53434GHSA-4x29-79gh-6v8q

org.apache.tomcat:tomcat-util: Apache Tomcat util accepted misconfigured CRLs

Apache Software Foundation org.apache.tomcat:tomcat-utilmavenWeb servers
Open in ThreatlineRecord JSON
CVSS
9.1Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.59%Chance of exploitation activity in the next 30 days, higher than 47% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in11.0.23Also 10.1.56, 9.0.119GitHub
Published29 Jun 2026Updated 23 Oct 2026CVE List

What fixes it

  • 11.0.23org.apache.tomcat:tomcat-util, mavenGitHub<dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat-util</artifactId><version>11.0.23</version></dependency>
  • 10.1.56org.apache.tomcat:tomcat-util, mavenGitHub<dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat-util</artifactId><version>10.1.56</version></dependency>
  • 9.0.119org.apache.tomcat:tomcat-util, mavenGitHub<dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat-util</artifactId><version>9.0.119</version></dependency>

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring Certificate Revocation List (CRLs) for a FFM based connector. If an FFM connector was configured with invalid CRLs, the invalid CRLs were ignored meaning invalid certificates could be accepted.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M7 through 10.1.55, from 9.0.83 through 9.0.118.

Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fixes the issue.

Text from GitHub Advisory Database

Affected versions 7

  • org.apache.tomcat:tomcat-util, maven>= 11.0.0-M1, <= 11.0.22GitHub
  • org.apache.tomcat:tomcat-util, maven>= 10.1.0-M7, <= 10.1.55GitHub
  • org.apache.tomcat:tomcat-util, maven>= 9.0.83, <= 9.0.118GitHub
  • Apache Tomcataffected: 11.0.0-M1 through 11.0.22CVE List
  • Apache Tomcataffected: 10.1.0-M7 through 10.1.55CVE List
  • Apache Tomcataffected: 9.0.83 through 9.0.118CVE List
  • Apache Tomcatunaffected: all versions through 9.0.82CVE List

References 6