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Back to active CVEs
Critical · CVSS 9.1CVE-2026-53434GHSA-4X29-79GH-6V8Q

Apache Tomcat util accepted misconfigured CRLsCVE-2026-53434

Answer in brief

CVE-2026-53434 records a Critical severity (CVSS 9.1) vulnerability in Apache Tomcat util accepted misconfigured CRLs. The current sources do not mark it as known exploited. The current feed maps org.apache.tomcat:tomcat-util (maven), org.apache.tomcat:tomcat-util (maven), org.apache.tomcat:tomcat-util (maven), org.apache.tomcat:tomcat-util (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 29, 2026Updated Oct 23, 2026Source checked Oct 23, 2026First seen by HOL Jun 29, 2026Material review Oct 23, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.1
Exploitation
Not marked as known exploited
Affected software
6 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps org.apache.tomcat:tomcat-util (maven), org.apache.tomcat:tomcat-util (maven), org.apache.tomcat:tomcat-util (maven), org.apache.tomcat:tomcat-util (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
org.apache.tomcat:tomcat-utilmaven>=11.0.0-M1 <11.0.2311.0.23
org.apache.tomcat:tomcat-utilmaven>=10.1.0-M7 <10.1.5610.1.56
org.apache.tomcat:tomcat-utilmaven>=9.0.83 <9.0.1199.0.119
org.apache.tomcat:tomcat-utilmaven>=11.0.0-M1,<=11.0.2211.0.23
org.apache.tomcat:tomcat-utilmaven>=10.1.0-M7,<=10.1.5510.1.56
org.apache.tomcat:tomcat-utilmaven>=9.0.83,<=9.0.1189.0.119

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for org.apache.tomcat:tomcat-util, org.apache.tomcat:tomcat-util, org.apache.tomcat:tomcat-util.
  2. 2Review the reported fix. Update org.apache.tomcat:tomcat-util to 11.0.23; org.apache.tomcat:tomcat-util to 10.1.56; org.apache.tomcat:tomcat-util to 9.0.119; org.apache.tomcat:tomcat-util to 11.0.23; org.apache.tomcat:tomcat-util to 10.1.56; org.apache.tomcat:tomcat-util to 9.0.119 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jun 29, 2026

    Evidence: source:ghsa:source_dates:source-dates:record

  2. Source modified

    Oct 23, 2026

    Evidence: source:ghsa:source_dates:source-dates:record

  3. First seen by HOL

    Jun 29, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencelists.apache.org
  • NVD vulnerability recordnvd.nist.gov
  • Source referenceopenwall.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-390
Source
GitHub Security Advisories
Source checked
Oct 23, 2026
References
7 linked sources
Open source record