# CVE-2021-24122: Apache Tomcat information disclosure > Attackers can disclose JSP source code when Tomcat serves resources from network locations on NTFS file systems. - **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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:** 14 Jan 2021 - **Updated:** 8 Oct 2026 - **Also known as:** BIT-tomcat-2021-24122, DEBIAN-CVE-2021-24122, GHSA-2rvv-w9r2-rg7m, MGASA-2021-0072, OESA-2021-1075, SUSE-SU-2021:0530-1, SUSE-SU-2021:0531-1, UBUNTU-CVE-2021-24122, openSUSE-SU-2021:0330-1 ## What is CVE-2021-24122? CVE-2021-24122 is a medium-severity vulnerability in Apache Tomcat, published on 14 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description When serving resources from a network location using the NTFS file system, Apache Tomcat versions 10.0.0-M1 to 10.0.0-M9, 9.0.0.M1 to 9.0.39, 8.5.0 to 8.5.59 and 7.0.0 to 7.0.106 were susceptible to JSP source code disclosure in some configurations. The root cause was the unexpected behaviour of the JRE API File.getCanonicalPath() which in turn was caused by the inconsistent behaviour of the Windows API (FindFirstFileW) in some circumstances. Weakness: CWE-706 (Use of Incorrectly-Resolved Name or Reference), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) ## Which versions are affected by CVE-2021-24122? 9 open source packages ship an affected version, including org.apache.tomcat.embed:tomcat-embed-core and tomcat. It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 10.0.0-M1 | 10.0.0-M10 | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 10.0.0-M1 | 10.0.0-M10 | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 7.0.0 | 7.0.107 | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 7.0.0 | 7.0.107 | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 8.5.0 | 8.5.60 | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 8.5.0 | 8.5.60 | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 9.0.0 | 9.0.40 | | `org.apache.tomcat.embed:tomcat-embed-core` | Maven | From 9.0.0 | 9.0.40 | | `tomcat` | Bitnami | From 7.0.0 | 7.0.107, 8.5.60, 9.0.40 | | `tomcat` | SUSE:Linux Enterprise Module for Web and Scripting 15 SP2 | All versions | 9.0.36-3.21.1 | | `tomcat` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 9.0.36-3.61.1 | | `tomcat` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 9.0.36-3.61.1 | | `tomcat` | openSUSE:Leap 15.2 | All versions | 9.0.36-lp152.2.19.1 | Products: Apache Tomcat, Debian Debian Linux, Oracle Agile Product Lifecycle Management. ## How do I fix CVE-2021-24122? Upgrade org.apache.tomcat.embed:tomcat-embed-core to a fixed version for your release line: 10.0.0-M10, 7.0.107, 8.5.60 or 9.0.40. ## Is CVE-2021-24122 being exploited? There is no known exploitation of CVE-2021-24122 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-2021-24122 and fix it if it is affected. What it is: CVE-2021-24122 is a medium-severity vulnerability in Apache Tomcat, published on 14 Jan 2021. 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-2021-24122 in the wild and no public exploit code. Affected packages and fixed versions: - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 10.0.0-M1; fixed in 10.0.0-M10 - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 10.0.0-M1; fixed in 10.0.0-M10 - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 7.0.0; fixed in 7.0.107 - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 7.0.0; fixed in 7.0.107 - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.5.0; fixed in 8.5.60 - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.5.0; fixed in 8.5.60 - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 9.0.0; fixed in 9.0.40 - org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 9.0.0; fixed in 9.0.40 - tomcat (Bitnami): affected from 7.0.0; fixed in 7.0.107, 8.5.60, 9.0.40 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-2021-24122/ (Markdown: https://insights.sbomify.com/CVE-2021-24122/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24122 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24122 - OSV: https://osv.dev/vulnerability/CVE-2021-24122 --- From sbomify Insights: https://insights.sbomify.com/CVE-2021-24122/ Summaries are generated and may contain mistakes; the official description above is the record.