CVE-2026-86243CWE-126

CVE-2026-86243

High · published September 23, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
48.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00605 · 48.3th percentile
Weakness
CWE-126 · Buffer Over-read
Published
2026-09-23T17:17Z
Affected products (2)
ProductVersionsFixed in
apache/tomcat_native≥ 1.3.0, < 1.3.91.3.9
apache/tomcat_native≥ 2.0.0, < 2.0.162.0.16
References (2)
EPSS history
Timeline
  • 25 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 23 SEP 12:24Z
    Apache Tomcat Native: DoS via TLS handshake
    cvelistv5