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CVE-2026-86243 Details
Description
Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected. Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Sep 23, 2026Exploitation: NoneAutomatable: YesTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/09/23/31 | CVE | Mailing ListThird Party Advisory |
| https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557 | [email protected] | Vendor AdvisoryMailing List |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-126 | Buffer Over-read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| apache tomcat native | >= 1.3.0, < 1.3.9 >= 2.0.0, < 2.0.16 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 6, 2026 | Initial Analysis | [email protected] |
| Sep 23, 2026 | CVE Modified | CVE |
| Sep 23, 2026 | CVE Modified | CISA-ADP |
| Sep 23, 2026 | New CVE Received | [email protected] |