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
CVE-2026-73635 is a CWE-770 vulnerability in Apache Struts involving allocation of resources without limits or throttling. When no fixed locale is set, the locale for localized-text lookups is derived from incoming requests. This enables unauthenticated remote attackers to cause unbounded growth of internal localized-text caches, exhausting the Java heap and resulting in denial of service. Versions affected 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. The issue is resolved in versions 6.11.0 and 7.3.0.
Potential Impact
An unauthenticated remote attacker can cause the internal localized-text caches to grow without limit, exhausting the Java heap memory and causing a denial of service to legitimate users. Applications that configure a fixed locale are not vulnerable.
Mitigation Recommendations
Users should upgrade to Apache Struts versions 6.11.0 or 7.3.0, which include fixes for this vulnerability. Alternatively, configuring a fixed locale in the application prevents exploitation of this issue. Patch status is not explicitly confirmed in the input data, but recommended upgrade versions indicate official fixes are 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.
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-2026-73635 is a CWE-770 vulnerability in Apache Struts involving allocation of resources without limits or throttling. When no fixed locale is set, the locale for localized-text lookups is derived from incoming requests. This enables unauthenticated remote attackers to cause unbounded growth of internal localized-text caches, exhausting the Java heap and resulting in denial of service. Versions affected 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. The issue is resolved in versions 6.11.0 and 7.3.0.
Potential Impact
An unauthenticated remote attacker can cause the internal localized-text caches to grow without limit, exhausting the Java heap memory and causing a denial of service to legitimate users. Applications that configure a fixed locale are not vulnerable.
Mitigation Recommendations
Users should upgrade to Apache Struts versions 6.11.0 or 7.3.0, which include fixes for this vulnerability. Alternatively, configuring a fixed locale in the application prevents exploitation of this issue. Patch status is not explicitly confirmed in the input data, but recommended upgrade versions indicate official fixes are 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: 08/15/2026, 11:14:14 UTC
Last updated: 08/15/2026, 15:19:31 UTC
Views: 9
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