What’s Vulnerable › Vulnerabilities
CVE-2026-73634: Apache Struts: Unbounded read of a Content Security Policy violation report
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-15 · updated 2026-08-18
- Weakness: CWE-400
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 products
- Apache Struts: from 6.0.0 before 6.11.0; from 7.0.0 before 7.3.0 — fixed in 6.11.0, 7.3.0
How to fix
Upgrade to a fixed version: Apache Struts 6.11.0, 7.3.0. Check the vendor advisory for mitigations.
References
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