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

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), org.apache.tomcat:tomcat-catalina (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven). 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
    # 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
    # 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
    # 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

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