Advisoriesby IbisApache Software FoundationCVE-2026-86247
Apache Tomcat Native: race condition
High7.4CVE-2026-86247 · Published Sep 23, 2026 · updated Oct 6, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Apache Tomcat Native Product | >= 2.0.0, <= 2.0.15 | No fix yet |
| >= 1.3.0, <= 1.3.8 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Severity from
- CISA (its enrichment of the CVE record)
- Weakness
- CWE-366
More Apache Software Foundation advisories
All Apache Software Foundation| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 23 | Apache Tomcat Native: insecure default | Critical9.1 | No fix yet |
| Sep 23 | Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake... | High7.5 | No fix yet |
| Sep 23 | Improper Check for Certificate Revocation vulnerability in Apache Tomcat | Medium6.5 | No fix yet |
| Sep 23 | Apache Tomcat: authentication bypass | Critical9.8 | No fix yet |
| Sep 23 | Apache Tomcat: race condition | High8.1 | No fix yet |
| Sep 23 | Apache Sling XSS: cross-site scripting | Medium6.1 | 2.4.12 |