Servers and applications
CVE-2021-30639
A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service. An error introduced as part of a change to improve error handling during non-blocking I/O meant that the error flag associated with the Request object was not reset between requests. This meant that once a non-blocking I/O error occurred, all future requests handled by that request object would fail.…
- Severity
- High 7.5
- Published
- 12 Jul 2021
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 21 Oct 2026
- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
Apache TomcatServers and applications · cpe:a:apache:tomcat |
|