Uncontrolled Resource Consumption in Apache Struts 6.0.0-6.10.0 & 7.0.0-7.2.1
CVE-2026-73634 Published on August 15, 2026
Apache Struts: Unbounded read of a Content Security Policy violation report
Uncontrolled resource consumption vulnerability in Apache Struts. An application that exposes an endpoint collecting Content Security Policy violation reports reads the submitted report into memory without bounding how much it will accept, so a single request can exhaust the heap and deny service to other users. Such endpoints are ordinarily reachable without authentication. The core distribution maps no such endpoint by default; applications that do not collect violation reports are not affected.
This issue affects Apache Struts: from 6.0.0 through 6.10.0, from 7.0.0 through 7.2.1.
Users are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue.
Vulnerability Analysis
CVE-2026-73634 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-73634 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-73634
Want to know whenever a new CVE is published for Apache Struts? stack.watch will email you.
Affected Versions
Apache Software Foundation Apache Struts:- Version 6.0.0, <= 6.10.0 is affected.
- Version 7.0.0, <= 7.2.1 is affected.