CVE-2026-73633

published 2026-08-14

CVE-2026-73633: Uncontrolled resource consumption vulnerability in the JSON plugin of Apache Struts. When an application is configured to populate actions from a JSON request…

Priority P3 47 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I N A H

Uncontrolled resource consumption vulnerability in the JSON plugin of Apache Struts. When an application is configured to populate actions from a JSON request body, the plugin reads that body into memory without bounding how much it will accept, so a single request can exhaust the heap and deny service to other users. The plugin's configurable JSON input length limit does not bound this read. The JSON plugin is an optional component; applications that do not use it, or use it without enabling JSON request-body handling, are not affected.

This issue affects Apache Struts: from 2.1.8 through 2.3.37, from 2.5.0 through 2.5.33, 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

8 ranges

Vendor	Product	Version range	Fixed in
apache	struts	2.1.8 – 2.3.37	—
apache	struts	2.5.0 – 2.5.33	—
apache	struts	>= 6.0.0 < 6.11.0	6.11.0
apache	struts	>= 7.0.0 < 7.3.0	7.3.0
apache_software_foundation	apache_struts	2.1.8 – 2.3.37	—
apache_software_foundation	apache_struts	2.5.0 – 2.5.33	—
apache_software_foundation	apache_struts	6.0.0 – 6.10.0	—
apache_software_foundation	apache_struts	7.0.0 – 7.2.1	—

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CWE-400