CVE-2026-73632: 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-response serialization state could be shared across concurrent requests, allowing response content associated with one request to become observable in another. Only the SMD / JSON-RPC handling of the JSON interceptor is affected, which is not enabled by default; applications using the json result type 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 (CVE-2026-73632) in Apache Struts 7.2.1 involves unsynchronized access to shared data within the JSON plugin's SMD / JSON-RPC handling. Due to per-response serialization state being shared across concurrent requests, response content intended for one request can be observed in another, leading to exposure of data elements to the wrong session. The flaw is limited to the JSON interceptor's SMD / JSON-RPC handling and does not affect the json result type. The vulnerability is fixed in version 7.3.0.
Potential Impact
The vulnerability allows information disclosure where response content from one user's request may be visible to another concurrent request, potentially leaking sensitive data. The impact is limited to confidentiality (partial data exposure) with no integrity or availability effects. The affected functionality is not enabled by default, reducing the exposure risk.
Mitigation Recommendations
Users should upgrade Apache Struts from version 7.2.1 to 7.3.0, where this issue is fixed. Since the affected JSON interceptor SMD / JSON-RPC handling is not enabled by default, disabling or not using this feature also mitigates the risk. No other specific mitigations are indicated.
CVE-2026-73632: 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-response serialization state could be shared across concurrent requests, allowing response content associated with one request to become observable in another. Only the SMD / JSON-RPC handling of the JSON interceptor is affected, which is not enabled by default; applications using the json result type 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.
CVSS v3.1
Score 4.3medium
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 (CVE-2026-73632) in Apache Struts 7.2.1 involves unsynchronized access to shared data within the JSON plugin's SMD / JSON-RPC handling. Due to per-response serialization state being shared across concurrent requests, response content intended for one request can be observed in another, leading to exposure of data elements to the wrong session. The flaw is limited to the JSON interceptor's SMD / JSON-RPC handling and does not affect the json result type. The vulnerability is fixed in version 7.3.0.
Potential Impact
The vulnerability allows information disclosure where response content from one user's request may be visible to another concurrent request, potentially leaking sensitive data. The impact is limited to confidentiality (partial data exposure) with no integrity or availability effects. The affected functionality is not enabled by default, reducing the exposure risk.
Mitigation Recommendations
Users should upgrade Apache Struts from version 7.2.1 to 7.3.0, where this issue is fixed. Since the affected JSON interceptor SMD / JSON-RPC handling is not enabled by default, disabling or not using this feature also mitigates the risk. No other specific mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-13T11:51:41.735Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a804609bf8831d539f35a82
Added to database: 08/15/2026, 10:57:13 UTC
Last enriched: 08/22/2026, 13:24:51 UTC
Last updated: 08/31/2026, 22:52:13 UTC
Views: 46
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