Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. (CVE-2026-73632)
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
CVE-2026-73632 describes a session data exposure vulnerability in the JSON plugin of Apache Struts version 7.2.1. The flaw causes per-response serialization state to be shared improperly across concurrent requests within the SMD / JSON-RPC handling of the JSON interceptor, potentially allowing response content from one request to be observed in another. This vulnerability does not affect the json result type and only impacts configurations where the JSON interceptor's SMD / JSON-RPC handling is enabled, which is not the default setting. The issue is resolved in Apache Struts 7.3.0.
Potential Impact
The vulnerability can lead to unintended data exposure between concurrent sessions when using the affected JSON interceptor functionality. This could result in sensitive information leakage between users or requests. However, since the affected feature is not enabled by default and the common json result type is unaffected, the impact is limited to specific configurations.
Mitigation Recommendations
Users should upgrade Apache Struts to version 7.3.0 or later, where this vulnerability is fixed. If upgrading is not immediately possible, disabling the SMD / JSON-RPC handling of the JSON interceptor will mitigate the issue, as this feature is not enabled by default.
Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. (CVE-2026-73632)
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
CVE-2026-73632 describes a session data exposure vulnerability in the JSON plugin of Apache Struts version 7.2.1. The flaw causes per-response serialization state to be shared improperly across concurrent requests within the SMD / JSON-RPC handling of the JSON interceptor, potentially allowing response content from one request to be observed in another. This vulnerability does not affect the json result type and only impacts configurations where the JSON interceptor's SMD / JSON-RPC handling is enabled, which is not the default setting. The issue is resolved in Apache Struts 7.3.0.
Potential Impact
The vulnerability can lead to unintended data exposure between concurrent sessions when using the affected JSON interceptor functionality. This could result in sensitive information leakage between users or requests. However, since the affected feature is not enabled by default and the common json result type is unaffected, the impact is limited to specific configurations.
Mitigation Recommendations
Users should upgrade Apache Struts to version 7.3.0 or later, where this vulnerability is fixed. If upgrading is not immediately possible, disabling the SMD / JSON-RPC handling of the JSON interceptor will mitigate the issue, as this feature is not enabled by default.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-87hf-473v-8h9c
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-73632"]
- State
- PUBLISHED
Threat ID: 6a808b65bf8831d5394f4794
Added to database: 08/15/2026, 15:53:09 UTC
Last enriched: 08/15/2026, 15:55:05 UTC
Last updated: 09/29/2026, 18:13:11 UTC
Views: 54
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