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
CVE-2026-73634 is a CWE-400 uncontrolled resource consumption vulnerability in Apache Struts. Applications exposing an endpoint that collects Content Security Policy violation reports read the submitted data into memory without bounding the amount accepted. This can lead to heap exhaustion and denial of service from a single request. The vulnerability affects Apache Struts versions 6.0.0 through 6.10.0 and 7.0.0 through 7.2.1. The default core distribution does not map such endpoints, so only applications that enable collection of violation reports are vulnerable. The issue is fixed in versions 6.11.0 and 7.3.0.
Potential Impact
An attacker can cause denial of service by sending a single large Content Security Policy violation report to an exposed endpoint, exhausting heap memory and impacting availability. There is no impact on confidentiality or integrity. The vulnerability requires no authentication and can be triggered remotely if the vulnerable endpoint is exposed.
Mitigation Recommendations
Users should upgrade Apache Struts to version 6.11.0 or 7.3.0, which contain fixes for this vulnerability. Since the core distribution does not expose the vulnerable endpoint by default, disabling or not enabling the collection of Content Security Policy violation reports also mitigates the risk. Patch status is not explicitly stated in the vendor advisory, but 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.
CVSS v3.1
Score 7.5high
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
CVE-2026-73634 is a CWE-400 uncontrolled resource consumption vulnerability in Apache Struts. Applications exposing an endpoint that collects Content Security Policy violation reports read the submitted data into memory without bounding the amount accepted. This can lead to heap exhaustion and denial of service from a single request. The vulnerability affects Apache Struts versions 6.0.0 through 6.10.0 and 7.0.0 through 7.2.1. The default core distribution does not map such endpoints, so only applications that enable collection of violation reports are vulnerable. The issue is fixed in versions 6.11.0 and 7.3.0.
Potential Impact
An attacker can cause denial of service by sending a single large Content Security Policy violation report to an exposed endpoint, exhausting heap memory and impacting availability. There is no impact on confidentiality or integrity. The vulnerability requires no authentication and can be triggered remotely if the vulnerable endpoint is exposed.
Mitigation Recommendations
Users should upgrade Apache Struts to version 6.11.0 or 7.3.0, which contain fixes for this vulnerability. Since the core distribution does not expose the vulnerable endpoint by default, disabling or not enabling the collection of Content Security Policy violation reports also mitigates the risk. Patch status is not explicitly stated in the vendor advisory, but 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: 08/22/2026, 13:24:59 UTC
Last updated: 09/04/2026, 10:52:11 UTC
Views: 58
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.