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Vulnerability details: VCID-9y3t-7vfv-cbd2
Vulnerability ID VCID-9y3t-7vfv-cbd2
Aliases CVE-2003-0866
GHSA-7wj2-48c4-2684
Summary 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.
Status Published
Exploitability 2.0
Weighted Severity 8.0
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-400 Uncontrolled Resource Consumption
System Score Found at
generic_textual MODERATE http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=215506
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
epss 0.20413 https://api.first.org/data/v1/epss?cve=CVE-2003-0866
apache_tomcat Important https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0866
generic_textual MODERATE http://secunia.com/advisories/30899
generic_textual MODERATE http://secunia.com/advisories/30908
generic_textual MODERATE https://exchange.xforce.ibmcloud.com/vulnerabilities/13429
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-7wj2-48c4-2684
generic_textual MODERATE https://lists.apache.org/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5@%3Cdev.tomcat.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74@%3Cdev.tomcat.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3@%3Cdev.tomcat.apache.org%3E
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2003-0866
generic_textual MODERATE http://sunsolve.sun.com/search/document.do?assetkey=1-26-239312-1
generic_textual MODERATE http://tomcat.apache.org/security-4.html
generic_textual MODERATE http://www.debian.org/security/2003/dsa-395
generic_textual MODERATE http://www.securityfocus.com/bid/8824
generic_textual MODERATE http://www.vupen.com/english/advisories/2008/1979/references
Reference id Reference type URL
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=215506
https://api.first.org/data/v1/epss?cve=CVE-2003-0866
http://secunia.com/advisories/30899
http://secunia.com/advisories/30908
https://exchange.xforce.ibmcloud.com/vulnerabilities/13429
https://lists.apache.org/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3@%3Cdev.tomcat.apache.org%3E
http://sunsolve.sun.com/search/document.do?assetkey=1-26-239312-1
http://tomcat.apache.org/security-4.html
http://www.debian.org/security/2003/dsa-395
http://www.securityfocus.com/bid/8824
http://www.vupen.com/english/advisories/2008/1979/references
CVE-2003-0866 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0866
CVE-2003-0866 https://nvd.nist.gov/vuln/detail/CVE-2003-0866
CVE-2003-0866;OSVDB-8772 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/23245.pl
CVE-2003-0866;OSVDB-8772 Exploit https://www.securityfocus.com/bid/8824/info
GHSA-7wj2-48c4-2684 https://github.com/advisories/GHSA-7wj2-48c4-2684
Data source Exploit-DB
Date added Oct. 15, 2003
Description Apache Tomcat 4.0.x - Non-HTTP Request Denial of Service
Ransomware campaign use Known
Source publication date Oct. 15, 2003
Exploit type dos
Platform linux
Source update date Dec. 9, 2012
Source URL https://www.securityfocus.com/bid/8824/info
Exploit Prediction Scoring System (EPSS)
Percentile 0.95507
EPSS Score 0.20413
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:38:20.609276+00:00 Apache Tomcat Importer Import https://tomcat.apache.org/security-4.html 38.0.0