CVE-2026-73634: CWE-400 Uncontrolled Resource Consumption in Apache Software Foundation Apache Struts
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.
AI Analysis
Technical Summary
This vulnerability in Apache Struts arises from an endpoint that collects Content Security Policy violation reports reading unbounded data into memory, leading to uncontrolled resource consumption (CWE-400). This can cause heap exhaustion and denial of service. The affected versions are 6.0.0 through 6.10.0 and 7.0.0 through 7.2.1. The default Apache Struts distribution does not expose such endpoints, so only applications that enable this feature are vulnerable. The issue is fixed in versions 6.11.0 and 7.3.0.
Potential Impact
An attacker can send a single large Content Security Policy violation report to the vulnerable endpoint, causing the application to consume excessive heap memory and potentially deny service to legitimate users. This affects availability but does not indicate direct compromise or data leakage. The vulnerability requires the application to expose the specific endpoint, which is not enabled by default.
Mitigation Recommendations
Users should upgrade affected Apache Struts versions to 6.11.0 or 7.3.0, where the vulnerability is fixed. Since the core distribution does not expose the vulnerable endpoint by default, applications not collecting Content Security Policy violation reports are not affected. Patch status is not explicitly stated in the vendor advisory, but the recommended upgrade versions indicate an official fix is available.
CVE-2026-73634: CWE-400 Uncontrolled Resource Consumption in Apache Software Foundation Apache Struts
Description
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.
Affected software
pkg:maven/org.apache.struts/struts2-coreRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache Struts arises from an endpoint that collects Content Security Policy violation reports reading unbounded data into memory, leading to uncontrolled resource consumption (CWE-400). This can cause heap exhaustion and denial of service. The affected versions are 6.0.0 through 6.10.0 and 7.0.0 through 7.2.1. The default Apache Struts distribution does not expose such endpoints, so only applications that enable this feature are vulnerable. The issue is fixed in versions 6.11.0 and 7.3.0.
Potential Impact
An attacker can send a single large Content Security Policy violation report to the vulnerable endpoint, causing the application to consume excessive heap memory and potentially deny service to legitimate users. This affects availability but does not indicate direct compromise or data leakage. The vulnerability requires the application to expose the specific endpoint, which is not enabled by default.
Mitigation Recommendations
Users should upgrade affected Apache Struts versions to 6.11.0 or 7.3.0, where the vulnerability is fixed. Since the core distribution does not expose the vulnerable endpoint by default, applications not collecting Content Security Policy violation reports are not affected. Patch status is not explicitly stated in the vendor advisory, but the recommended upgrade versions indicate an official fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-13T11:52:13.479Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a804609bf8831d539f35a85
Added to database: 08/15/2026, 10:57:13 UTC
Last enriched: 08/15/2026, 11:14:20 UTC
Last updated: 08/15/2026, 13:00:00 UTC
Views: 5
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