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CVE-2026-73634— Apache Struts: Unbounded read of a Content Security Policy violation report

Quick assessment

Affected
Apache Software Foundation Apache Struts
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Struts是美国Apache基金会开源的一款基于MVC模式的Java Web应用框架。 Apache Struts 6.0.0版本至6.10.0版本和7.0.0版本至7.2.1版本存在资源管理错误漏洞，该漏洞源于未限制收集内容安全策略违规报告的端点接收的报告大小，可能导致未经身份验证的攻击者通过单个请求耗尽堆内存并拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.73% · P52

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache Struts 6.0.0≤ 6.10.0 affected
7.0.0≤ 7.2.1 affected
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I. Basic Information for CVE-2026-73634

Vulnerability Information
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Vulnerability Title
Apache Struts: Unbounded read of a Content Security Policy violation report
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Struts 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Struts是美国Apache基金会开源的一款基于MVC模式的Java Web应用框架。 Apache Struts 6.0.0版本至6.10.0版本和7.0.0版本至7.2.1版本存在资源管理错误漏洞，该漏洞源于未限制收集内容安全策略违规报告的端点接收的报告大小，可能导致未经身份验证的攻击者通过单个请求耗尽堆内存并拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Struts 6.0.0 ~ 6.10.0 -

II. Public POCs for CVE-2026-73634

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III. Intelligence Information for CVE-2026-73634

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Vendor Advisories for CVE-2026-73634 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-15 · 4 CVEs total

CVE-2026-73635 Apache Struts: Unbounded growth of localized-text caches driven by the request locale
CVE-2026-73631 Apache Struts: Shared parsing state in the JSON plugin
CVE-2026-73632 Apache Struts: Shared serialization state in the JSON plugin

IV. Related Vulnerabilities

Same product: Apache Struts
Same vendor: Apache Software Foundation
Same weakness: CWE-400

V. Comments for CVE-2026-73634

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