Apache Tomcat: DoS via WebSocket chat example (Apache Software Foundation Apache Tomcat)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.55 % · percentile 46 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- apache
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-49855
- GCVE · GCVE-0-2026-66299
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1249 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1083 — Multiples vulnérabilités dans Apache Tomcat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0940 — Vulnérabilité dans Apache Tomcat · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 9.0.89 < 9.0.121cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 10.1.24 < 10.1.58cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 11.0.1 < 11.0.25cpe:2.3:a:apache:tomcat:11.0.0:milestone20:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:11.0.0:milestone21:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:11.0.0:milestone22:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:11.0.0:milestone23:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:11.0.0:milestone24:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:11.0.0:milestone25:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:11.0.0:milestone26:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Apache Software Foundation · Apache Tomcat | affected 11.0.0-M20 ≤ 11.0.24 ; affected 10.1.24 ≤ 10.1.57 ; affected 9.0.89 ≤ 9.0.120 ; unaffected 0 ≤ 8.5.100 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |