Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Struts | >= 2.1.8, <= 2.3.37 |
Related Weaknesses (CWE)
References
- https://cwiki.apache.org/confluence/display/WW/S2-072Vendor Advisory
FAQ
What is CVE-2026-73633?
CVE-2026-73633 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 mem...
How severe is CVE-2026-73633?
CVE-2026-73633 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73633?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Struts.