CVE-2026-104714: CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Apache Software Foundation Apache Struts
Description
Concurrent execution using shared resource with improper synchronization ('race condition') vulnerability in Apache Struts. Where a localized message formats a date or time argument, the formatter retained for that message by the application-wide text provider is used by concurrently served requests without isolation, so a value belonging to one user can appear in another user's response, or the rendering can fail and surface as a server error. Applications whose localized messages format no date or time arguments are not affected. This issue affects Apache Struts: from 2.0.0 through 2.3.37, from 2.5.0 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0. Users are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.
Affected software
Apache Software Foundation
Apache Struts
pkg:maven/Apache Software Foundation/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 involves improper synchronization of a shared resource in Apache Struts' localized message formatting component. Specifically, when date or time arguments are formatted, the application-wide text provider retains a formatter that is accessed concurrently by multiple requests without isolation. This race condition can lead to data leakage between users or server errors during rendering. The issue affects multiple version ranges of Apache Struts, with fixed versions available at 6.12.0 and 7.4.0.
Potential Impact
The vulnerability can cause cross-user data leakage where one user's localized date/time formatted message might appear in another user's response. It can also cause rendering failures resulting in server errors. This impacts confidentiality and availability of the affected application. However, applications not using localized messages with date/time arguments are not impacted.
Mitigation Recommendations
Users should upgrade Apache Struts to versions 6.12.0 or 7.4.0 or later, where this race condition vulnerability is fixed. No other mitigation is indicated. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-10-02T10:55:01.052Z
- State
- PUBLISHED
Threat ID: 6ac3f1292cdf04f6562d91a7
Added to database: 10/05/2026, 18:49:13 UTC
Last enriched: 10/05/2026, 19:05:53 UTC
Last updated: 10/05/2026, 19:34:03 UTC
Views: 7
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