CVE-2026-73635: CWE-770 Allocation of Resources Without Limits or Throttling in Apache Software Foundation Apache Struts
Apache Struts contains a vulnerability where resource allocation is not limited or throttled when no fixed locale is configured. This allows an unauthenticated remote attacker to cause the framework's localized-text caches to grow without bound by manipulating the locale in incoming requests, potentially exhausting the Java heap and causing a denial of service. Applications that configure a fixed locale are not affected. The issue affects multiple version ranges of Apache Struts and is fixed in versions 6.11.0 and 7.3.0.
AI Analysis
Technical Summary
CVE-2026-73635 is a resource exhaustion vulnerability in Apache Struts affecting versions 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. When no fixed locale is configured, the locale for localized-text lookups is derived from the incoming request, allowing an unauthenticated remote client to cause the internal localized-text caches to grow indefinitely. This unbounded growth can exhaust the Java heap, resulting in denial of service to other users. The vulnerability is mitigated by configuring a fixed locale or upgrading to Apache Struts versions 6.11.0 or 7.3.0 where the issue is fixed.
Potential Impact
An unauthenticated remote attacker can cause the Apache Struts framework to consume excessive memory by forcing unbounded growth of localized-text caches, leading to Java heap exhaustion and denial of service. This impacts availability of applications using vulnerable versions without a fixed locale configuration.
Mitigation Recommendations
Users should upgrade to Apache Struts versions 6.11.0 or 7.3.0 where this vulnerability is fixed. Alternatively, configuring a fixed locale in the application prevents exploitation of this issue. No other mitigation is indicated by the vendor advisory.
CVE-2026-73635: CWE-770 Allocation of Resources Without Limits or Throttling in Apache Software Foundation Apache Struts
Description
Apache Struts contains a vulnerability where resource allocation is not limited or throttled when no fixed locale is configured. This allows an unauthenticated remote attacker to cause the framework's localized-text caches to grow without bound by manipulating the locale in incoming requests, potentially exhausting the Java heap and causing a denial of service. Applications that configure a fixed locale are not affected. The issue affects multiple version ranges of Apache Struts and is fixed in versions 6.11.0 and 7.3.0.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73635 is a resource exhaustion vulnerability in Apache Struts affecting versions 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. When no fixed locale is configured, the locale for localized-text lookups is derived from the incoming request, allowing an unauthenticated remote client to cause the internal localized-text caches to grow indefinitely. This unbounded growth can exhaust the Java heap, resulting in denial of service to other users. The vulnerability is mitigated by configuring a fixed locale or upgrading to Apache Struts versions 6.11.0 or 7.3.0 where the issue is fixed.
Potential Impact
An unauthenticated remote attacker can cause the Apache Struts framework to consume excessive memory by forcing unbounded growth of localized-text caches, leading to Java heap exhaustion and denial of service. This impacts availability of applications using vulnerable versions without a fixed locale configuration.
Mitigation Recommendations
Users should upgrade to Apache Struts versions 6.11.0 or 7.3.0 where this vulnerability is fixed. Alternatively, configuring a fixed locale in the application prevents exploitation of this issue. No other mitigation is indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-prrh-5r25-ch75
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-73635"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a808b65bf8831d5394f4765
Added to database: 08/15/2026, 15:53:09 UTC
Last enriched: 08/15/2026, 15:54:44 UTC
Last updated: 08/15/2026, 15:54:44 UTC
Views: 1
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