← Vulnerability feed

Vulnerability record · CVE-2026-73633 · published 14 August 2026

CVE-2026-73633: Apache struts uncontrolled resource consumption vulnerability

Apache · Struts

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.

7.5 CVSS 3.1 High EPSS 0.70% · top 48.9% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score
0.70%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
18 Aug 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cwiki.apache.org/confluence/display/WW/S2-072 Vendor Advisory

Track CVE-2026-73633 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-17530Apache Struts forced OGNL evaluation enables remote code executionApache Struts 2.0.0 through 2.5.25 performs forced OGNL evaluation on raw user input placed in tag attributes, allowing expression language injection…KEVEPSS 96%analysed9.8CVE-2017-9791Apache Struts 1 plugin input validation flaw enables remote code executionThe Struts 1 plugin in Apache Struts 2.1.x and 2.3.x may allow remote code execution when a malicious field value is passed in a raw message to the A…KEVEPSS 99%analysed9.8CVE-2017-5638Apache Struts 2 Jakarta Multipart parser remote code executionThe Jakarta Multipart parser in Apache Struts 2 mishandles exceptions and error messages during file-upload attempts, letting a crafted Content-Type,…KEVEPSS 100%analysed9.8CVE-2013-2251Apache Struts 2 OGNL injection enables remote code executionApache Struts 2.0.0 through 2.3.15 fails to properly validate request parameters, allowing crafted action:, redirect:, or redirectAction: prefixes to…KEVEPSS 100%analysed9.8CVE-2012-0391Apache Struts ExceptionDelegator OGNL injection enables remote code executionApache Struts before 2.2.3.1 evaluates parameter values as OGNL expressions in the ExceptionDelegator component during exception handling for mismatc…KEVEPSS 76%analysed8.1CVE-2018-11776Apache Struts namespace handling flaw enables remote code executionApache Struts 2.3 through 2.3.34 and 2.5 through 2.5.16 can execute remote code when alwaysSelectFullNamespace is enabled and results or url tags are…KEVEPSS 100%analysed8.1CVE-2017-9805Apache Struts REST Plugin XStream deserialization RCEThe REST Plugin in Apache Struts 2.1.1 through 2.3.x before 2.3.34 and 2.5.x before 2.5.13 uses an XStreamHandler with an XStream instance for deseri…KEVEPSS 99%analysed7.5CVE-2006-1547Apache Struts 1 ActionForm multipart parameter denial of serviceApache Struts before 1.2.9 with BeanUtils 1.7 exposes the public getMultipartRequestHandler method through ActionForm parameter binding. A remote att…KEVEPSS 55%analysed

Source: NIST National Vulnerability Database (record CVE-2026-73633), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.