Exposure of Data Element to Wrong Session in Apache Struts - CVE-2026-73631
Published: August 24, 2026
Vulnerability identifier: #VU144836
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-73631
CWE-ID: CWE-488
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to shared parsing state in the JSON plugin when processing concurrent JSON requests. A remote attacker can send crafted requests to disclose sensitive information.
Only applications that populate actions from a JSON request body using the JSON plugin are affected.
Affected software
Apache Struts
How to mitigate CVE-2026-73631
Install security update from vendor's website.
Apache Struts - update to 7.3.0