PatchTheCVEtomcat vulnerabilities and fixes
Recent CVEs affecting tomcat, with upgrade or downgrade steps. 1 tracked.
tomcat has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-07-28. Highest priority: CVE-2026-66299 (score 40/100).
- CVE-2026-66299 MEDIUM 5.3 UPGRADE Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue affects
FAQ
How do I fix tomcat vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is tomcat being exploited right now?
None of the tracked tomcat CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which tomcat CVE should I patch first?
CVE-2026-66299 currently ranks highest (40/100): Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue affects.