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High · 7.5 Public exploit CVE-2026-73633 EUVD-2026-58662GHSA-335q-cpqh-m68h

Apache Struts: Unbounded read of a JSON request body

Published Aug 14, 2026 · Updated Aug 14, 2026 · Assigned by apache

Vendor: Apache Software Foundation Product: Apache Struts

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

VendorProductAffectedFixed
Apache Software Foundation Apache Struts 2.1.8 – ≤ 2.3.37, 2.5.0 – ≤ 2.5.33, 6.0.0 – ≤ 6.10.0, 7.0.0 – ≤ 7.2.1 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 2

References