---
id: CVE-2026-73581
title: Improper Check for Certificate Revocation vulnerability in Apache Tomcat
summary: >-
  Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both
  the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate
  uses a keystore.




  This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-299
vendor: Apache Software Foundation
product: Apache Tomcat
affected:
  - apache_tomcat >= 11.0.0-M1 <= 11.0.25
  - apache_tomcat >= 10.1.0-M1 <= 10.1.59
  - apache_tomcat >= 9.0.0.M1 <= 9.0.121
  - apache_tomcat >= 8.5.0 <= 8.50.100
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T19:19:13.367'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73581'
references:
  - url: 'https://lists.apache.org/thread/r0dj3h1pbn4wv96fhsfrnz3t6874t6do'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/23/19'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-23T15:19:35.322766Z'
ingestedAt: '2026-09-23T11:22:32.916Z'
epss: 0.00117
epssPercentile: 0.01493
---

## Overview

Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore.



This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.58, from 9.0.0-M1 through 9.0.121.



The following versions were EOL at the time the CVE was created but are 
known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.



Users are recommended to upgrade to version 11.0.26, 10.1.59, 9.0.122, which fixes the issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.