CVE-2021-24122 Apache Tomcat information disclosure

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, CWE-200

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.

Products include 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 Apache Tomcat Path Equivalence Exploited Critical 10.0
• CVE-2016-8735 Apache Tomcat Remote Code Execution Exploited Critical 9.8
• CVE-2017-12617 Apache Tomcat Remote Code Execution Exploited High 8.1
• CVE-2017-12615 Apache Tomcat on Windows Remote Code Execution Exploited High 8.1
• CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Exploited High 7.5

All Apache Tomcat vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

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 and 3 more.