CVE-2026-73635: CWE-770 Allocation of Resources Without Limits or Throttling in Apache Software Foundation Apache Struts
Allocation of resources without limits or throttling vulnerability in Apache Struts. When no fixed locale is configured, the locale used for localized-text lookups is taken from the incoming request, allowing an unauthenticated remote client to cause the framework's internal localized-text caches to grow without bound and exhaust the Java heap, denying service to other users. Applications that configure a fixed locale 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 6.10.0, from 7.0.0 through 7.2.1. Users are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue.
AI Analysis
Technical Summary
This vulnerability in Apache Struts (CWE-770) arises from the framework using the locale from incoming requests for localized-text lookups when no fixed locale is configured. This allows unauthenticated remote clients to cause unbounded growth of the internal localized-text caches, exhausting the Java heap memory and resulting in denial of service. The affected versions include 2.0.0 through 2.3.37, 2.5.0 through 2.5.33, 6.0.0 through 6.10.0, and 7.0.0 through 7.2.1. Fixed versions are 6.11.0 and 7.3.0.
Potential Impact
An unauthenticated remote attacker can cause a denial of service by exhausting the Java heap memory through uncontrolled growth of localized-text caches. There is no impact on confidentiality or integrity. The denial of service affects availability of the Apache Struts application.
Mitigation Recommendations
Users should upgrade affected Apache Struts versions to 6.11.0 or 7.3.0, which contain fixes for this issue. Alternatively, configuring a fixed locale in the application prevents exploitation. Patch status is not explicitly confirmed in the input data, but the recommendation to upgrade to fixed versions indicates an official fix is available.
CVE-2026-73635: CWE-770 Allocation of Resources Without Limits or Throttling in Apache Software Foundation Apache Struts
Description
Allocation of resources without limits or throttling vulnerability in Apache Struts. When no fixed locale is configured, the locale used for localized-text lookups is taken from the incoming request, allowing an unauthenticated remote client to cause the framework's internal localized-text caches to grow without bound and exhaust the Java heap, denying service to other users. Applications that configure a fixed locale 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 6.10.0, from 7.0.0 through 7.2.1. Users are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue.
CVSS v3.1
Score 7.5high
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 (CWE-770) arises from the framework using the locale from incoming requests for localized-text lookups when no fixed locale is configured. This allows unauthenticated remote clients to cause unbounded growth of the internal localized-text caches, exhausting the Java heap memory and resulting in denial of service. The affected versions include 2.0.0 through 2.3.37, 2.5.0 through 2.5.33, 6.0.0 through 6.10.0, and 7.0.0 through 7.2.1. Fixed versions are 6.11.0 and 7.3.0.
Potential Impact
An unauthenticated remote attacker can cause a denial of service by exhausting the Java heap memory through uncontrolled growth of localized-text caches. There is no impact on confidentiality or integrity. The denial of service affects availability of the Apache Struts application.
Mitigation Recommendations
Users should upgrade affected Apache Struts versions to 6.11.0 or 7.3.0, which contain fixes for this issue. Alternatively, configuring a fixed locale in the application prevents exploitation. Patch status is not explicitly confirmed in the input data, but the recommendation to upgrade to fixed versions indicates an official fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-13T11:52:36.541Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a804609bf8831d539f35a88
Added to database: 08/15/2026, 10:57:13 UTC
Last enriched: 08/22/2026, 13:25:07 UTC
Last updated: 09/06/2026, 22:52:13 UTC
Views: 66
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