Uncontrolled resource consumption vulnerability in Apache Struts. (CVE-2026-73634)
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 involves uncontrolled resource consumption (CWE-400) through an endpoint that collects Content Security Policy violation reports. The endpoint reads incoming reports into memory without bounding the size, enabling a single request to exhaust heap memory and deny service to other users. The vulnerability affects Apache Struts versions from 6.0.0 through 6.10.0 and 7.0.0 through 7.2.1. The default Apache Struts distribution does not expose this endpoint; only applications that explicitly collect violation reports 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 an exposed endpoint, causing uncontrolled memory consumption that exhausts the heap. This results in denial of service to other users of the application. Since the endpoint is usually unauthenticated, it can be triggered by any remote attacker. Applications not exposing such an endpoint are not affected.
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 and require no action. Patch status is confirmed by the vendor's recommended upgrade versions.
Uncontrolled resource consumption vulnerability in Apache Struts. (CVE-2026-73634)
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
This vulnerability in Apache Struts involves uncontrolled resource consumption (CWE-400) through an endpoint that collects Content Security Policy violation reports. The endpoint reads incoming reports into memory without bounding the size, enabling a single request to exhaust heap memory and deny service to other users. The vulnerability affects Apache Struts versions from 6.0.0 through 6.10.0 and 7.0.0 through 7.2.1. The default Apache Struts distribution does not expose this endpoint; only applications that explicitly collect violation reports 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 an exposed endpoint, causing uncontrolled memory consumption that exhausts the heap. This results in denial of service to other users of the application. Since the endpoint is usually unauthenticated, it can be triggered by any remote attacker. Applications not exposing such an endpoint are not affected.
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 and require no action. Patch status is confirmed by the vendor's recommended upgrade versions.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-wxrh-8hrv-h99q
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-73634"]
- State
- PUBLISHED
Threat ID: 6a808b65bf8831d5394f4761
Added to database: 08/15/2026, 15:53:09 UTC
Last enriched: 08/15/2026, 15:54:37 UTC
Last updated: 09/29/2026, 18:13:09 UTC
Views: 71
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