Resource exhaustion in Apache Struts - CVE-2026-73634
Published: August 24, 2026
Vulnerability identifier: #VU144839
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-73634
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in an endpoint collecting Content Security Policy violation reports when handling a submitted violation report. A remote attacker can send a specially crafted request with an oversized report body to cause a denial of service.
The core distribution maps no such endpoint by default; only applications that collect violation reports are affected.
Affected software
Apache Struts
How to mitigate CVE-2026-73634
Install security update from vendor's website.
Apache Struts - addressed in versions 6.11.0, 7.3.0