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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-73633

Apache Struts: Unbounded read of a JSON request body

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Apache Software Foundation Apache Struts

Default version status: unaffected

  • 2.1.8 to ≤ 2.3.37affected
  • 2.5.0 to ≤ 2.5.33affected
  • 6.0.0 to ≤ 6.10.0affected
  • 7.0.0 to ≤ 7.2.1affected

References