CVE-2026-86243

EUVD-2026-85267
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apachetomcat_native
2.0.0 ≤
𝑥
≤ 2.0.15
CNA
apachetomcat_native
1.3.0 ≤
𝑥
≤ 1.3.8
CNA
Debian logo
Debian Releases
Debian Product
Codename
tomcat-native
bookworm
vulnerable
forky
2.0.16-1
fixed
sid
2.0.16-1
fixed
trixie
vulnerable
Common Weakness Enumeration
References
https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557
http://www.openwall.com/lists/oss-security/2026/09/23/31