# CVE-2003-0866

## Summary

- **CVE ID:** CVE-2003-0866
- **Severity:** UNKNOWN
- **CVSS Score:** 0.82
- **CWE:** N/A
- **Published:** Oct 17, 2003
- **Last Modified:** Mar 16, 2026

## Description

The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://tomcat.apache.org/security-4.html)
- [CNA](http://secunia.com/advisories/30908)
- [CNA](http://www.securityfocus.com/bid/8824)
- [CNA](http://sunsolve.sun.com/search/document.do?assetkey=1-26-239312-1)
- [CNA](http://secunia.com/advisories/30899)
- [CNA](http://www.vupen.com/english/advisories/2008/1979/references)
- [CNA](http://www.debian.org/security/2003/dsa-395)
- [CNA](http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=215506)
- [CNA](https://exchange.xforce.ibmcloud.com/vulnerabilities/13429)
- [CNA](https://lists.apache.org/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5%40%3Cdev.tomcat.apache.org%3E)
- [CNA](https://lists.apache.org/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74%40%3Cdev.tomcat.apache.org%3E)
- [CNA](https://lists.apache.org/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3%40%3Cdev.tomcat.apache.org%3E)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 20.41%
- **EPSS Percentile:** 95.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._