7.4

CVE-2026-86247

Apache Tomcat Native: Client certificate requirements can be down-graded

Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations.



This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected.



Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Apache ≫ Tomcat Native Version >= 1.3.0 < 1.3.9
Apache ≫ Tomcat Native Version >= 2.0.0 < 2.0.16
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.066
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 7.4 2.2 5.2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-366 Race Condition within a Thread

If two threads of execution use a resource simultaneously, there exists the possibility that resources may be used while invalid, in turn making the state of execution undefined.

https://lists.apache.org/thread/obsson6zhvfg0wsp2bx602l61ltj87r1
Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/09/23/33
Third Party Advisory
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