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CVE-2003-0866 apache Tomcat

Affected softwareapache Tomcat
Severity5.0 Medium CVSS 2.0
Fixed in4.1.0
WeaknessUncontrolled resource consumption (CWE-400)
Published17 Nov 2003
Updated16 Jun 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.

Exploitation status

Working exploit published

A reviewed exploit catalogue lists ready-to-run exploit code for this CVE.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC 1 indexed Published artifacts you can open, in Exploit-DB; first seen 2003-10-15.
  • EPSS 35% chance in 30 days A model's forecast, not a report of exploitation. Higher than 98% of all scored CVEs.
IndexArtifactStarsFirst seen
Exploit-DB Apache Tomcat 4.0.x - Non-HTTP Request Denial of Service 2003-10-15

Waratek protection

Mitigation candidate

A kind of vulnerability Waratek's rules address, with exploit code published or exploitation reported. No rule exists and none is planned yet. The decision below says what we found to build a rule from.

  • Protection none
  • Action unverified
  • Review automated Inferred
  • Record active
Decided by The affected package being open source on Maven, so the fix can be read
Finding This CVE affects an open-source Java library published on Maven Central (Maven packages: org.apache.tomcat:tomcat), so it is squarely in ARMR's territory and the source needed to understand the defect is public. That makes it a candidate for an ARMR patch rule. No rule exists and none is scheduled: the diff between the affected and fixed versions has not been read, and a closer look may find no hook point ARMR can act on.

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.tomcat:tomcat 4.0 4.1.0 unbounded

Products and versions

2 products, 8 version entries
SourceVendorProductSchemeAffected versions
nvd apache tomcat generic 4.0.0 · 4.0.1 · 4.0.2 · 4.0.3 · 4.0.4 · 4.0.5 · 4.0.6
osv org.apache.tomcat tomcat generic ≥ 4.0 and < 4.1.0

References

URLTags
https://exchange.xforce.ibmcloud.com/vulnerabilities/13429 WEB
https://lists.apache.org/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5@%3Cdev.tomcat.apache.org%3E WEB
https://lists.apache.org/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74@%3Cdev.tomcat.apache.org%3E WEB
https://lists.apache.org/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3@%3Cdev.tomcat.apache.org%3E WEB
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=215506 WEB
http://secunia.com/advisories/30899 WEB
http://secunia.com/advisories/30908 WEB
http://sunsolve.sun.com/search/document.do?assetkey=1-26-239312-1 WEB
http://tomcat.apache.org/security-4.html WEB
http://www.debian.org/security/2003/dsa-395 WEB

Timeline

Published2003-11-17By the CVE Program.
NVD record modified2026-06-16NVD's own last-modified date for this record.