Apache Tomcat 5.5 lifecycle

Current status

end of lifehigh

Apache Tomcat 5.5 reached end of life on 1 Oct 2012. 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: 1 Oct 2012
Latest release: 5.5.36
Released: 9 Oct 2012

At a glance

Version line: 5.5
Initial release: 23 Sept 2005
Lifecycle phase: end of life
Latest stable: 5.5.36
Latest release date: 9 Oct 2012
EOL: 1 Oct 2012
Risk: high
Releases tracked: 17

Lifecycle timeline

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

Release
23 Sept 2005
end of lifecurrent
1 Oct 2012 → —
Source: Apache Tomcat whichversion

Apache Tomcat 5.5 reached end of life on 1 Oct 2012. 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 5.5

End of lifeEOL 1 October 2012

Supported upgrade options

Apache Tomcat 11.0
Supported· 6 major versions newer
Upgrade planner →
Apache Tomcat 10.1
Supported· 5 major versions newer
Upgrade planner →
Apache Tomcat 9.0
SupportedEOL 31 March 2027· ~173 months more support· 4 major versions newer
Upgrade planner →

Open full upgrade planner for Apache Tomcat 5.5 →

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
Fixed in:
10.5.3, 9.4.0
Source:
CISA KEV · Advisory

Security

Advisories affecting Apache Tomcat 5.5 (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
Fixed in:
10.5.3, 9.4.0
Source:
CISA KEV · Advisory
CVE-2021-33037
Affected:
<=10.0.6
Source:
OSV source · Advisory

Latest release

5.5.36

Released 9 Oct 2012 · stable

https://archive.apache.org/dist/tomcat/tomcat-5/v5.5.36/

Previous releases

5.5.35
13 Jun 2012
5.5.34
18 Sept 2011
5.5.33
8 Feb 2011

Release history

17 concrete releases tracked for this line.

Version	Release date	Channel	Source
5.5.36	9 Oct 2012	stable	Source
5.5.35	13 Jun 2012	stable	Source
5.5.34	18 Sept 2011	stable	Source
5.5.33	8 Feb 2011	stable	Source
5.5.32	23 Jan 2011	stable	Source
5.5.31	16 Sept 2010	stable	Source
5.5.30	8 Jul 2010	stable	Source
5.5.29	20 Apr 2010	stable	Source
5.5.28	20 Apr 2010	stable	Source
5.5.27	5 Sept 2008	stable	Source
5.5.26	4 Feb 2008	stable	Source
5.5.25	7 Sept 2007	stable	Source
5.5.23	8 Mar 2007	stable	Source
5.5.20	30 Sept 2006	stable	Source
5.5.17	14 Apr 2006	stable	Source
5.5.16	16 Mar 2006	stable	Source
5.5.12	23 Sept 2005	stable	Source

Release activity

Total releases: 17
Last 30 days: 0
Last 90 days: 0
Avg. interval: ~172 days
Most recent: 9 Oct 2012

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.

	5.5	11.0
Status	end of life	standard support
Latest release	5.5.36	11.0.25
EOL	Oct 2012	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: 17
Lifecycle periods: 1
EOL: Known
Provenance records: 2
Data last checked: 1 Sept 2026
Latest source update: 1 Sept 2026