Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. (CVE-2026-73631)
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
CVE-2026-73631 is a vulnerability in Apache Struts 7.2.1's JSON plugin where per-request parsing state can be improperly shared across concurrent requests. This flaw may lead to exposure of data elements from one session to another and cause parsing limits to be bypassed. Applications not using the JSON plugin are not affected. The issue is fixed in version 7.3.0.
Potential Impact
Data associated with one request may become observable in another concurrent request, potentially exposing sensitive information. Additionally, configured parsing limits may not be enforced as intended, which could affect application behavior. The impact is limited to applications that enable and use the JSON plugin.
Mitigation Recommendations
Users should upgrade Apache Struts to version 7.3.0, which contains the fix for this vulnerability. Applications that do not use the JSON plugin are not affected and require no action.
Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. (CVE-2026-73631)
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.
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-2026-73631 is a vulnerability in Apache Struts 7.2.1's JSON plugin where per-request parsing state can be improperly shared across concurrent requests. This flaw may lead to exposure of data elements from one session to another and cause parsing limits to be bypassed. Applications not using the JSON plugin are not affected. The issue is fixed in version 7.3.0.
Potential Impact
Data associated with one request may become observable in another concurrent request, potentially exposing sensitive information. Additionally, configured parsing limits may not be enforced as intended, which could affect application behavior. The impact is limited to applications that enable and use the JSON plugin.
Mitigation Recommendations
Users should upgrade Apache Struts to version 7.3.0, which contains the fix for this vulnerability. Applications that do not use the JSON plugin are not affected and require no action.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-gvf6-rf7m-9h3g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-73631"]
- State
- PUBLISHED
Threat ID: 6a808b65bf8831d5394f4790
Added to database: 08/15/2026, 15:53:09 UTC
Last enriched: 08/15/2026, 15:54:59 UTC
Last updated: 09/29/2026, 18:13:09 UTC
Views: 53
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