CVE-2026-53434 — CRITICAL (9.1)

Q: How severe is CVE-2026-53434?

CVE-2026-53434 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2026-53434?

Check the references section above for vendor advisories and patch information. Affected products include: Apache Tomcat.

Vulnerability Description

Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring CRLs for a FFM based connector. 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.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Apache	Tomcat	>= 9.0.83, < 9.0.119

Related Weaknesses (CWE)

CWE-390

References

https://lists.apache.org/thread/x510lbq0sfrd1qyo7q3r1mpllgpdcoskVendor AdvisoryMailing List
http://www.openwall.com/lists/oss-security/2026/06/29/22Third Party Advisory

FAQ

What is CVE-2026-53434?

CVE-2026-53434 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring CRLs for a FFM based connector. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1...

How severe is CVE-2026-53434?

CVE-2026-53434 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-53434?

Check the references section above for vendor advisories and patch information. Affected products include: Apache Tomcat.