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CVE-2026-34500— Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled

Quick assessment

Affected
Apache Software Foundation Apache Tomcat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat 11.0.0-M14至11.0.20版本、10.1.22至10.1.53版本和9.0.92至9.0.116版本存在安全漏洞，该漏洞源于当软故障禁用且使用FFM时，CLIENT_CERT身份验证在某些场景下未按预期失败。

AI Predicted 5.3 Difficulty: Easy EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-34500

Vulnerability Information
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Vulnerability Title
Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
Source: CVE Program / CVE List V5
Vulnerability Description
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Tomcat 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat 11.0.0-M14至11.0.20版本、10.1.22至10.1.53版本和9.0.92至9.0.116版本存在安全漏洞，该漏洞源于当软故障禁用且使用FFM时，CLIENT_CERT身份验证在某些场景下未按预期失败。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Tomcat 11.0.0-M14 ~ 11.0.20 -

II. Public POCs for CVE-2026-34500

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III. Intelligence Information for CVE-2026-34500

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Same Patch Batch · Apache Software Foundation · 2026-04-09 · 17 CVEs total

CVE-2026-34487 Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer tok
CVE-2026-34486 Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
CVE-2026-34483 Apache Tomcat: Incomplete escaping of JSON access logs
CVE-2026-32990 Apache Tomcat: Fix for CVE-2025-66614 is incomplete
CVE-2026-29146 Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default
CVE-2026-29145 Apache Tomcat, Apache Tomcat Native: OCSP checks sometimes soft-fail even when soft-fail i
CVE-2026-29129 Apache Tomcat: TLS cipher order is not preserved
CVE-2026-25854 Apache Tomcat: Occasionally open redirect
CVE-2026-24880 Apache Tomcat: Request smuggling via invalid chunk extension
CVE-2026-40046 Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT: Missing fix for CVE-2025-66168
CVE-2026-33005 Apache OpenMeetings: Insufficient checks in FileWebService
CVE-2026-33266 Apache OpenMeetings: Hardcoded Remember-Me Cookie Encryption Key and Salt
CVE-2026-34020 Apache OpenMeetings: Login Credentials Passed via GET Query Parameters
CVE-2025-57735 Apache Airflow: Airflow Logout Not Invalidating JWT
CVE-2025-62188 Apache DolphinScheduler: Users can access sensitive information through the actuator endpo
CVE-2026-34538 Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

IV. Related Vulnerabilities

Same product: Apache Tomcat
Same vendor: Apache Software Foundation

V. Comments for CVE-2026-34500

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