---
id: CVE-2016-6796
title: >-
  A malicious web application running on 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 was
  able to bypass a configured SecurityManager via manipulation of the
  configuration par…
summary: >-
  A malicious web application running on 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 was
  able to bypass a configured SecurityManager via manipulation of the
  configuration par…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
vendor: apache
product: tomcat
affected:
  - 'tomcat >= 6.0.0, <= 6.0.45'
  - 'tomcat >= 7.0.0, <= 7.0.70'
  - 'tomcat >= 8.0, <= 8.0.36'
  - 'tomcat >= 8.5.0, <= 8.5.4'
  - tomcat = 9.0.0
  - debian_linux = 8.0
  - oncommand_insight
  - oncommand_shift
  - snap_creator_framework
  - ubuntu_linux = 16.04
  - tekelec_platform_distribution = 7.4.0
  - tekelec_platform_distribution = 7.7.1
  - jboss_enterprise_application_platform = 6.4
  - jboss_enterprise_web_server = 3.0.0
  - enterprise_linux_desktop = 7.0
  - enterprise_linux_eus = 7.4
  - enterprise_linux_eus = 7.5
  - enterprise_linux_eus = 7.6
  - enterprise_linux_eus = 7.7
  - enterprise_linux_server = 7.0
  - enterprise_linux_server_aus = 7.4
  - enterprise_linux_server_aus = 7.6
  - enterprise_linux_server_aus = 7.7
  - enterprise_linux_server_tus = 7.6
  - enterprise_linux_server_tus = 7.7
  - enterprise_linux_workstation = 7.0
published: '2017-08-11'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:16:38.973'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2016-6796'
references:
  - url: 'http://rhn.redhat.com/errata/RHSA-2017-0457.html'
    label: security@apache.org
  - url: 'http://rhn.redhat.com/errata/RHSA-2017-1551.html'
    label: security@apache.org
  - url: 'http://www.debian.org/security/2016/dsa-3720'
    label: security@apache.org
  - url: 'http://www.securityfocus.com/bid/93944'
    label: security@apache.org
  - url: 'http://www.securitytracker.com/id/1037141'
    label: security@apache.org
  - url: 'http://www.securitytracker.com/id/1038757'
    label: security@apache.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:0455'
    label: security@apache.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:0456'
    label: security@apache.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:1548'
    label: security@apache.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:1549'
    label: security@apache.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:1550'
    label: security@apache.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:1552'
    label: security@apache.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:2247'
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/5a2105a56b2495ab70fa568f06925bd861f0d71ffab4fb38bb4fdc45%40%3Cannounce.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: >-
      https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E
    label: security@apache.org
  - url: 'https://security.netapp.com/advisory/ntap-20180605-0001/'
    label: security@apache.org
  - url: 'https://usn.ubuntu.com/4557-1/'
    label: security@apache.org
  - url: 'https://www.oracle.com/security-alerts/cpuoct2021.html'
    label: security@apache.org
  - url: 'http://rhn.redhat.com/errata/RHSA-2017-0457.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://rhn.redhat.com/errata/RHSA-2017-1551.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.debian.org/security/2016/dsa-3720'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securityfocus.com/bid/93944'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securitytracker.com/id/1037141'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securitytracker.com/id/1038757'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:0455'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:0456'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:1548'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:1549'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:1550'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:1552'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:2247'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/5a2105a56b2495ab70fa568f06925bd861f0d71ffab4fb38bb4fdc45%40%3Cannounce.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20180605-0001/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/4557-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpuoct2021.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.08321
epssPercentile: 0.94814
ingestedAt: '2026-10-08T23:16:47.285Z'
---

## Overview

A malicious web application running on 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 was able to bypass a configured SecurityManager via manipulation of the configuration parameters for the JSP Servlet.

## Affected

- `tomcat >= 6.0.0, <= 6.0.45`
- `tomcat >= 7.0.0, <= 7.0.70`
- `tomcat >= 8.0, <= 8.0.36`
- `tomcat >= 8.5.0, <= 8.5.4`
- `tomcat = 9.0.0`
- `debian_linux = 8.0`
- `oncommand_insight`
- `oncommand_shift`
- `snap_creator_framework`
- `ubuntu_linux = 16.04`
- `tekelec_platform_distribution = 7.4.0`
- `tekelec_platform_distribution = 7.7.1`
- `jboss_enterprise_application_platform = 6.4`
- `jboss_enterprise_web_server = 3.0.0`
- `enterprise_linux_desktop = 7.0`
- `enterprise_linux_eus = 7.4`
- `enterprise_linux_eus = 7.5`
- `enterprise_linux_eus = 7.6`
- `enterprise_linux_eus = 7.7`
- `enterprise_linux_server = 7.0`
- `enterprise_linux_server_aus = 7.4`
- `enterprise_linux_server_aus = 7.6`
- `enterprise_linux_server_aus = 7.7`
- `enterprise_linux_server_tus = 7.6`
- `enterprise_linux_server_tus = 7.7`
- `enterprise_linux_workstation = 7.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.