CVE-2026-73631: CWE-567 Unsynchronized Access to Shared Data in a Multithreaded Context in Apache Software Foundation Apache Struts
Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. Per-request parsing state could be shared across concurrent requests, allowing data associated with one request to become observable in another, and configured parsing limits not to be enforced as intended. Populating actions from a JSON request body is not enabled by default; applications that do not use the JSON plugin are not affected. This issue affects Apache Struts: 7.2.1. Users are recommended to upgrade to version 7.3.0, which fixes the issue.
AI Analysis
Technical Summary
This vulnerability in Apache Struts 7.2.1 involves unsynchronized access to shared data within the JSON plugin, leading to exposure of data elements across concurrent sessions. The root cause is that per-request parsing state is shared improperly, allowing data associated with one request to be observable in another. Additionally, configured parsing limits may fail to be enforced. Applications that do not enable the JSON plugin are not affected. The issue is fixed in version 7.3.0.
Potential Impact
The vulnerability can lead to exposure of sensitive data from one user session to another due to shared parsing state in concurrent requests. This compromises data confidentiality within affected applications using the JSON plugin. Parsing limits not being enforced may also increase risk of resource exhaustion or denial of service. Applications not using the JSON plugin are unaffected.
Mitigation Recommendations
Users should upgrade Apache Struts from version 7.2.1 to 7.3.0, which contains the fix for this vulnerability. Since the JSON plugin is not enabled by default, applications not using this plugin are not impacted and require no action. Patch status is not explicitly stated beyond recommending upgrade to 7.3.0; check vendor advisory for confirmation.
CVE-2026-73631: CWE-567 Unsynchronized Access to Shared Data in a Multithreaded Context in Apache Software Foundation Apache Struts
Description
Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. Per-request parsing state could be shared across concurrent requests, allowing data associated with one request to become observable in another, and configured parsing limits not to be enforced as intended. Populating actions from a JSON request body is not enabled by default; applications that do not use the JSON plugin are not affected. This issue affects Apache Struts: 7.2.1. Users are recommended to upgrade to version 7.3.0, which fixes the issue.
Affected software
pkg:maven/org.apache.struts/struts2-coreRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache Struts 7.2.1 involves unsynchronized access to shared data within the JSON plugin, leading to exposure of data elements across concurrent sessions. The root cause is that per-request parsing state is shared improperly, allowing data associated with one request to be observable in another. Additionally, configured parsing limits may fail to be enforced. Applications that do not enable the JSON plugin are not affected. The issue is fixed in version 7.3.0.
Potential Impact
The vulnerability can lead to exposure of sensitive data from one user session to another due to shared parsing state in concurrent requests. This compromises data confidentiality within affected applications using the JSON plugin. Parsing limits not being enforced may also increase risk of resource exhaustion or denial of service. Applications not using the JSON plugin are unaffected.
Mitigation Recommendations
Users should upgrade Apache Struts from version 7.2.1 to 7.3.0, which contains the fix for this vulnerability. Since the JSON plugin is not enabled by default, applications not using this plugin are not impacted and require no action. Patch status is not explicitly stated beyond recommending upgrade to 7.3.0; check vendor advisory for confirmation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-13T11:51:27.818Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a804609bf8831d539f35a7f
Added to database: 08/15/2026, 10:57:13 UTC
Last enriched: 08/15/2026, 11:14:30 UTC
Last updated: 08/15/2026, 13:06:00 UTC
Views: 6
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