CVE-2016-5018: Apache Software Foundation Apache Tomcat…

CVE-2016-5018: In Apache Tomcat 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6....

In Apache Tomcat 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 a malicious web application was able to bypass a configured SecurityManager via a Tomcat utility method that was accessible to web applications.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 18:38 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw lets a malicious web application bypass Tomcat's configured SecurityManager. The main business risk is loss of an isolation control: code expected to be restricted may gain broader access inside the Tomcat process. Evidence does not show active exploitation. Exposure is likely where legacy Tomcat versions in the listed ranges still run and SecurityManager was used as an application isolation boundary. Highest concern is shared hosting, multi-team platforms, or environments allowing third-party WAR deployment. Treat as a targeted legacy-platform risk. Prioritize remediation where Tomcat hosts untrusted applications or SecurityManager is part of the control model; otherwise handle through normal legacy middleware patching. Mitigation focus: Inventory Tomcat versions across servers, containers, and bundled application packages.; Upgrade affected Tomcat installations using Apache or operating-system vendor guidance.; Prioritize systems relying on SecurityManager to isolate untrusted or semi-trusted web applications..

Prepared: Jun 12, 2026, 21:41 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: Aug 10, 2017, 16:00 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

24Source 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
RHSA-2017:1548CVE reference · vendor-advisory, x_refsource_REDHAT
RHSA-2017:1549CVE reference · vendor-advisory, x_refsource_REDHAT
RHSA-2017:1552CVE reference · vendor-advisory, x_refsource_REDHAT
RHSA-2017:2247CVE reference · vendor-advisory, x_refsource_REDHAT
[announce] 20161027 [SECURITY] CVE-2016-5018 Apache Tomcat Security Manager BypassCVE reference · mailing-list, x_refsource_MLIST
RHSA-2017:0455CVE reference · vendor-advisory, x_refsource_REDHAT
RHSA-2017:1550CVE reference · vendor-advisory, x_refsource_REDHAT
RHSA-2017:0456CVE reference · vendor-advisory, x_refsource_REDHAT
[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190319 svn commit: r1855831 [23/30] - in /tomcat/site/trunk: ./ docs/ xdocs/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190325 svn commit: r1856174 [22/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190325 svn commit: r1856174 [21/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190413 svn commit: r1857494 [16/20] - in /tomcat/site/trunk: ./ docs/ xdocs/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190413 svn commit: r1857494 [15/20] - in /tomcat/site/trunk: ./ docs/ xdocs/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190415 svn commit: r1857582 [17/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20190415 svn commit: r1857582 [16/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20200203 svn commit: r1873527 [23/30] - /tomcat/site/trunk/docs/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20200213 svn commit: r1873980 [27/34] - /tomcat/site/trunk/docs/CVE reference · mailing-list, x_refsource_MLIST
[tomcat-dev] 20200213 svn commit: r1873980 [26/34] - /tomcat/site/trunk/docs/CVE reference · mailing-list, x_refsource_MLIST
USN-4557-1CVE reference · vendor-advisory, x_refsource_UBUNTU
https://security.netapp.com/advisory/ntap-20180605-0001/CVE reference · x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpuoct2021.htmlCVE reference · x_refsource_MISC

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

Apache Software FoundationApache Tomcat9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70, 6.0.0 to 6.0.45Listed

Weakness

CWE details

No CWE listed

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