High [CVE-2026-73635] Allocation of resources without limits or throttling vulnerability in Apache Struts
This high-severity Apache Software Foundation advisory covers CVE-2026-73635 affecting Apache Struts.
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Summary
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.
- 2.0.0 through 2.3.37
- 2.5.0 through 2.5.33
- 6.0.0 through 6.10.0
- 7.0.0 through 7.2.1.
- through 7.2.1
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 6.11.0
- 7.3.0
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Applications that configure a fixed locale are not affected.
- Users are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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