CVE-2003-0866: n/a vulnerability

CVE-2003-0866: The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 02:05 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2003-0866 is an availability issue in Apache Tomcat 4.0.x through 4.0.3. Malformed requests that do not follow HTTP can make Tomcat reject later requests, disrupting service. The bundle does not provide CVSS, CWE, or evidence of active exploitation. Exposure is likely limited to legacy Tomcat 4.0.x deployments, especially internet-facing services still using 4.0.3 or earlier. The provided affected product metadata is incomplete, so inventory confirmation is required. Treat as a moderate priority unless a legacy Tomcat 4.0.x service is exposed or business-critical. The main risk is service disruption, not data theft, but unsupported legacy application servers should be removed quickly. Mitigation focus: Identify any Tomcat 4.0.x instances, especially 4.0.3 or earlier.; Consult Apache Tomcat security guidance for the applicable fixed or supported version.; Review Debian or Sun advisories if using vendor-packaged Tomcat builds..

Prepared: Jun 30, 2026, 08:14 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 17, 2003, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
tomcat-non-http-dos(13429)CVE reference · vdb-entry, x_refsource_XF
[tomcat-dev] 20190319 svn commit: r1855831 [21/30] - in /tomcat/site/trunk: ./ docs/ xdocs/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190325 svn commit: r1856174 [19/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20200213 svn commit: r1873980 [24/34] - /tomcat/site/trunk/docs/CVE reference · mailing-list, x_refsource_MLIST

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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