# CVE-2016-6796: Apache Tomcat vulnerable to SecurityManager bypass > A malicious web application can bypass the configured SecurityManager in Apache Tomcat by manipulating JSP Servlet configuration parameters. - **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 11 Aug 2017 - **Updated:** 8 Oct 2026 - **Also known as:** GHSA-3mjp-p938-4329, UBUNTU-CVE-2016-6796 ## What is CVE-2016-6796? CVE-2016-6796 is a high-severity vulnerability in Apache Tomcat, published on 11 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description 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. ## Which versions are affected by CVE-2016-6796? 10 open source packages ship an affected version, including org.apache.tomcat:tomcat. It affects 15 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `org.apache.tomcat:tomcat` | Maven | From 6.0.0 | 6.0.46 | | `org.apache.tomcat:tomcat` | Maven | From 6.0.0 | 6.0.46 | | `org.apache.tomcat:tomcat` | Maven | From 7.0.0 | 7.0.71 | | `org.apache.tomcat:tomcat` | Maven | From 7.0.0 | 7.0.71 | | `org.apache.tomcat:tomcat` | Maven | From 8.0.0.RC1 | 8.0.37 | | `org.apache.tomcat:tomcat` | Maven | From 8.0.0.RC1 | 8.0.37 | | `org.apache.tomcat:tomcat` | Maven | From 8.5.0 | 8.5.5 | | `org.apache.tomcat:tomcat` | Maven | From 8.5.0 | 8.5.5 | | `org.apache.tomcat:tomcat` | Maven | From 9.0.0.M1 | 9.0.0.M10 | | `org.apache.tomcat:tomcat` | Maven | From 9.0.0.M1 | 9.0.0.M10 | Products: Apache Tomcat, Canonical Ubuntu Linux, Debian Debian Linux, Netapp Oncommand Insight, Netapp Oncommand Shift, Netapp Snap Creator Framework, Oracle Tekelec Platform Distribution, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Tus, Redhat Enterprise Linux Workstation, Redhat Jboss Enterprise Application Platform, Redhat Jboss Enterprise Web Server. ## How do I fix CVE-2016-6796? Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 6.0.46, 7.0.71, 8.0.37 or 8.5.5. ## Is CVE-2016-6796 being exploited? There is no known exploitation of CVE-2016-6796 in the wild and no public exploit code. ## Other vulnerabilities in Apache Tomcat - [CVE-2025-24813](https://insights.sbomify.com/CVE-2025-24813/): Apache Tomcat Path Equivalence (critical 10.0, exploited in the wild) - [CVE-2016-8735](https://insights.sbomify.com/CVE-2016-8735/): Apache Tomcat Remote Code Execution (critical 9.8, exploited in the wild) - [CVE-2017-12617](https://insights.sbomify.com/CVE-2017-12617/): Apache Tomcat Remote Code Execution (high 8.1, exploited in the wild) - [CVE-2017-12615](https://insights.sbomify.com/CVE-2017-12615/): Apache Tomcat on Windows Remote Code Execution (high 8.1, exploited in the wild) - [CVE-2026-34486](https://insights.sbomify.com/CVE-2026-34486/): Apache Tomcat Missing Encryption of Sensitive Data (high 7.5, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2016-6796 and fix it if it is affected. What it is: CVE-2016-6796 is a high-severity vulnerability in Apache Tomcat, published on 11 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2016-6796 in the wild and no public exploit code. Affected packages and fixed versions: - org.apache.tomcat:tomcat (Maven): affected from 6.0.0; fixed in 6.0.46 - org.apache.tomcat:tomcat (Maven): affected from 6.0.0; fixed in 6.0.46 - org.apache.tomcat:tomcat (Maven): affected from 7.0.0; fixed in 7.0.71 - org.apache.tomcat:tomcat (Maven): affected from 7.0.0; fixed in 7.0.71 - org.apache.tomcat:tomcat (Maven): affected from 8.0.0.RC1; fixed in 8.0.37 - org.apache.tomcat:tomcat (Maven): affected from 8.0.0.RC1; fixed in 8.0.37 - org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.5 - org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.5 - org.apache.tomcat:tomcat (Maven): affected from 9.0.0.M1; fixed in 9.0.0.M10 - org.apache.tomcat:tomcat (Maven): affected from 9.0.0.M1; fixed in 9.0.0.M10 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2016-6796/ (Markdown: https://insights.sbomify.com/CVE-2016-6796/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2016-6796 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-6796 - OSV: https://osv.dev/vulnerability/CVE-2016-6796 --- From sbomify Insights: https://insights.sbomify.com/CVE-2016-6796/ Summaries are generated and may contain mistakes; the official description above is the record.