High 7.5Published Sep 23, 2026

CVE-2026-86243Apache Tomcat Native: DoS via TLS handshake

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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It affects Apache Software Foundation Apache Tomcat Native and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Tomcat Native

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-126
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Sep 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Tomcat Native apache_software_foundation:apache_tomcat_native (from the name)	from 2.0.0 through 2.0.15; from 1.3.0 through 1.3.8	CNA record
apache tomcat_native apache:tomcat_native	from 1.3.0 before 1.3.9; from 2.0.0 before 2.0.16	NVD

References

References

https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/09/23/31	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.