CVE-2026-86247 | BDVDB-2026-378221 Detail

ApacheApache Tomcat Native

Description#

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact none. Attack vector: network.

Weaknesses#

CWE-366 Race condition within a thread

References#

Exploit#

No public exploit known

History#

Version 12026-09-23Record published in the CVE List.

Published

Published: 2026-09-23
Last modified: 2026-09-23

Vendor information

Vendor: Apache
Product: Apache Tomcat Native

All Apache vulnerabilities

Score

7.4 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 10.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.0.0 and <= 2.0.15
Fixed
Not stated
Vulnerable
>= 1.3.0 and <= 1.3.8
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.4 High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).