Apache Tomcat 4.1 lifecycle

Current status

end of lifehigh

Apache Tomcat 4.1 reached end of life on 25 Jun 2009. Security and bug fixes are no longer provided by the project according to published lifecycle data.

This line is end of life.

Plan your upgrade →

Security: 2 tracked advisories affecting this line · 1 in CISA KEV. Details below — lifecycle and vulnerability status are separate.

Official lifecycle source: Apache Tomcat whichversion

Support phase: end of life
End of life: 25 Jun 2009
Latest release: 4.1.40
Released: 25 Jun 2009

At a glance

Version line: 4.1
Initial release: 27 Oct 2003
Lifecycle phase: end of life
Latest stable: 4.1.40
Latest release date: 25 Jun 2009
EOL: 25 Jun 2009
Risk: high
Releases tracked: 10

Lifecycle timeline

Phases from published LifecyclePeriod records. Missing phases are not inferred.

Release
27 Oct 2003
end of lifecurrent
25 Jun 2009 → —
Source: Apache Tomcat whichversion

Apache Tomcat 4.1 reached end of life on 25 Jun 2009. Security and bug fixes are no longer provided by the project according to published lifecycle data.

Upgrade options

Newer supported Apache Tomcat version lines from CompatHub lifecycle data. Compatibility and security context use existing evidence only.

You are on Apache Tomcat 4.1

End of lifeEOL 25 June 2009

Supported upgrade options

Apache Tomcat 11.0
Supported· 7 major versions newer
Upgrade planner →
Apache Tomcat 10.1
Supported· 6 major versions newer
Upgrade planner →
Apache Tomcat 9.0
SupportedEOL 31 March 2027· ~213 months more support· 5 major versions newer
Upgrade planner →

Open full upgrade planner for Apache Tomcat 4.1 →

Known exploited vulnerabilities

CVE entries that CISA lists in the Known Exploited Vulnerabilities catalogue, including due dates and ransomware use when published. CVSS shown when NVD enrichment is available.

CVE-2023-44487Known exploited
HTTP/2 Rapid Reset Attack Vulnerability
CISA KEV:
listed · added 2023-10-10 · due 2023-10-31
Required action:
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected:
<10.5.3; <9.4.0; <4.2.2; <4.1.100
Fixed in:
10.5.3, 9.4.0, 4.2.2, 4.1.100
Source:
CISA KEV · Advisory

Security

Advisories affecting Apache Tomcat 4.1 (OSV.dev evidence). Known exploited status, due dates, and ransomware use from CISA KEV when matched.

Known vulnerabilities: 2
Known exploited: 1
Highest CVSS: —

CVE-2023-44487Known exploited
HTTP/2 Rapid Reset Attack Vulnerability
CISA KEV:
listed · added 2023-10-10 · due 2023-10-31
Required action:
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected:
<10.5.3; <9.4.0; <4.2.2; <4.1.100
Fixed in:
10.5.3, 9.4.0, 4.2.2, 4.1.100
Source:
CISA KEV · Advisory
CVE-2021-33037
Affected:
<=10.0.6
Source:
OSV source · Advisory

Latest release

4.1.40

Released 25 Jun 2009 · stable

https://archive.apache.org/dist/tomcat/tomcat-4/v4.1.40/

Previous releases

4.1.39
2 Dec 2008
4.1.37
18 Feb 2008
4.1.36
7 Apr 2007

Release history

10 concrete releases tracked for this line.

Version	Release date	Channel	Source
4.1.40	25 Jun 2009	stable	Source
4.1.39	2 Dec 2008	stable	Source
4.1.37	18 Feb 2008	stable	Source
4.1.36	7 Apr 2007	stable	Source
4.1.34	4 Sept 2006	stable	Source
4.1.32	4 Jul 2006	stable	Source
4.1.31	11 Oct 2004	stable	Source
4.1.30	25 Jan 2004	stable	Source
4.1.29	27 Oct 2003	stable	Source
4.1.27	17 Jun 2006	stable	Source

Release activity

Total releases: 10
Last 30 days: 0
Last 90 days: 0
Avg. interval: ~230 days
Most recent: 25 Jun 2009

Should I use this version?

Not recommended for new deployments

Upgrade to a currently supported release line. Recommended target: Apache Tomcat 11.0.

Version comparison

Compact comparison against the nearest relevant release lines.

	4.1	11.0
Status	end of life	standard support
Latest release	4.1.40	11.0.25
EOL	Jun 2009	Not published
Risk	high	low

Sources

Where this information comes from.

Lifecycle sources

Apache Tomcat whichversionfirst party · high confidence
Official source: https://tomcat.apache.org/whichversion.html
Last verified 1 Sept 2026
OSV.devfirst party
Official source: https://osv.dev
Verification time not recorded
NVD (NIST)first party
Official source: https://nvd.nist.gov
Verification time not recorded
CISA Known Exploited Vulnerabilitiesfirst party
Official source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Verification time not recorded

Release sources

Apache Tomcat whichversionfirst party · high confidence
Official source: https://tomcat.apache.org/whichversion.html
Last verified 1 Sept 2026
Apache Tomcat ASF archivefirst party
Official source: https://archive.apache.org/dist/tomcat/
Verification time not recorded
Apache Tomcat GitHub tagsfirst party
Official source: https://api.github.com/repos/apache/tomcat/tags
Verification time not recorded

Data coverage

Last checked = last successful upstream check. Latest source update = when upstream content last changed.

Releases tracked: 10
Lifecycle periods: 1
EOL: Known
Provenance records: 2
Data last checked: 1 Sept 2026
Latest source update: 1 Sept 2026