Dashboard / CVE-2026-66299

CVE-2026-66299

MEDIUM
MEDIUM Priority: 0.03 BB Relevance: 71/100
Published: 2026-07-28 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: Low

Description

Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through 9.0.120. Users who have followed the security guidance to remove the examples web application are not affected by this issue. Users are recommended to remove the examples web application or to upgrade to version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue.

Weakness Classification (1)

Affected Software (8)

VendorProductVersion
apache tomcat 9.0.89 – 9.0.121
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0

References & Advisories (2)

Bug Bounty Relevance

71 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS — Exploitation Probability

0.55%
Raw Score 0.005530
Percentile 46.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00553
2026-10-28
0.00553

Intelligence Sources

nvd ref →

External Links