# CVE-2026-41284: Apache Tomcat resource exhaustion in WebDAV LOCK and PROPFIND handling

Source: https://junglewise.ai/threats/cve-2026-41284-apache-tomcat-resource-exhaustion-in-webdav-lock-and-propfind  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-18  
License: CC BY 4.0 with a link back

CVE-2026-41284 · Severity: high · CVSS 7.5 · Published 2026-05-12

Apache Tomcat is a widely used web server and application container for Java-based software. A vulnerability in its WebDAV component allows unauthenticated remote users to send excessively large requests, which can exhaust server resources. This could lead to a denial-of-service (DoS) condition, making the web server or hosted applications unavailable to legitimate users.

Technologies: [org.apache.tomcat:tomcat (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat), [org.apache.tomcat:tomcat-catalina (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat-catalina), [org.apache.tomcat.embed:tomcat-embed-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-embed-tomcat-embed-core). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2026-41284 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41284 being exploited in the wild.

**How severe is CVE-2026-41284?** High severity, with a CVSS score of 7.5, published 12 May 2026.

**Which products and versions are affected?** org.apache.tomcat:tomcat (Maven) ECOSYSTEM:introduced=0,fixed=9.0.118; org.apache.tomcat:tomcat-catalina (Maven) ECOSYSTEM:introduced=0,fixed=9.0.118; org.apache.tomcat.embed:tomcat-embed-core (Maven) ECOSYSTEM:introduced=0,fixed=9.0.118.

**Is there a fix for CVE-2026-41284?** Yes. org.apache.tomcat:tomcat (Maven): upgrade to 9.0.118 or later; org.apache.tomcat:tomcat-catalina (Maven): upgrade to 9.0.118 or later; org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 9.0.118 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-41284 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-41284?** Check whether you run org.apache.tomcat:tomcat (Maven), org.apache.tomcat:tomcat-catalina (Maven) or org.apache.tomcat.embed:tomcat-embed-core (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.tomcat:tomcat (Maven): upgrade to 9.0.118 or later

  ```sh
  # set org.apache.tomcat:tomcat to 9.0.118 in your pom.xml or build.gradle
  ```

- org.apache.tomcat:tomcat-catalina (Maven): upgrade to 9.0.118 or later

  ```sh
  # set org.apache.tomcat:tomcat-catalina to 9.0.118 in your pom.xml or build.gradle
  ```

- org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 9.0.118 or later

  ```sh
  # set org.apache.tomcat.embed:tomcat-embed-core to 9.0.118 in your pom.xml or build.gradle
  ```


## Technical details

A resource exhaustion vulnerability (CWE-770) exists in Apache Tomcat's WebDAV implementation. The server fails to enforce a limit on the request body size for WebDAV LOCK and PROPFIND requests. Because these methods are often accessible to unauthenticated users, a remote attacker can send specially crafted, large XML request bodies to consume excessive memory or CPU, leading to a denial of service. The fix introduces a configurable 'maxRequestBodySize' parameter for the WebDAV servlet, defaulting to 4096 bytes. Patches are available in versions 11.0.22, 10.1.55, and 9.0.118.

## Affected products

- Apache Tomcat 11.0.0-M1 to 11.0.21, 10.1.0-M1 to 10.1.54, 9.0.0.M1 to 9.0.117, 10.0.0-M1 to 10.0.27, 8.5.0 to 8.5.100, 4.0 to 7.0.109

## Identifiers

- CVE-2026-41284
- GHSA-gx5v-xp9w-j4cg

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory

## References

- [https://lists.apache.org/thread/2nvqjr7ovjmvx2vbhb7s61ycd5msc8qc](https://lists.apache.org/thread/2nvqjr7ovjmvx2vbhb7s61ycd5msc8qc)
- [http://www.openwall.com/lists/oss-security/2026/05/12/12](http://www.openwall.com/lists/oss-security/2026/05/12/12)
- [https://github.com/apache/tomcat/commit/17dacd9aa48628da2eba37a9ab743c0b6c71685c](https://github.com/apache/tomcat/commit/17dacd9aa48628da2eba37a9ab743c0b6c71685c)
- [https://github.com/apache/tomcat/commit/a96fffd18487a29c0a30d36f00cb2b2d91f6d42c](https://github.com/apache/tomcat/commit/a96fffd18487a29c0a30d36f00cb2b2d91f6d42c)
- [https://github.com/apache/tomcat/commit/b3d1c1c239142e806be0b7329d304b94a58913ed](https://github.com/apache/tomcat/commit/b3d1c1c239142e806be0b7329d304b94a58913ed)

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