Advisory details:
gitlab / maven/org.apache.tomcat/tomcat/CVE-2026-66299
| Advisory ID | gitlab/maven/org.apache.tomcat/tomcat/CVE-2026-66299 |
| Aliases |
CVE-2026-66299
|
| Summary | 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. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 0.0 |
| Risk | |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.tomcat/tomcat/CVE-2026-66299.yml |
| Reference id | Reference type | URL |
|---|---|---|
| 8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k | Advisory | https://lists.apache.org/thread/8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k |
| CVE-2026-66299 | https://nvd.nist.gov/vuln/detail/CVE-2026-66299 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
There are no SSVC decisions available.