CVE-2026-66299
A remote, anonymous attacker can exploit a vulnerability in Apache Tomcat to conduct a Denial of Service attack.
CSIRTS triage
- What
- A vulnerability in Apache Tomcat allows remote anonymous attackers to conduct a Denial of Service attack.
- Who is affected
- Deployments of Apache Tomcat are affected.
- Urgency
- Remediation is medium urgency as the vulnerability could lead to service disruption.
- Action
- Apply available patches or implement mitigations.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.
Advisory coverage (3)
- medium[NEW] [medium] Apache Tomcat: Vulnerability allows Denial of Servicecert-bund · 2026-07-29
- unknownVulnerability in Apache Tomcat (July 29, 2026)cert-fr-avis · 2026-07-29
- highCVE-2026-66299: Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. Thi…nvd · 2026-07-28
External references
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[](https://www.csirts.com/cve/CVE-2026-66299)