Severity: moderate Affected versions: - Apache Struts (org.apache.struts:struts2-core) 2.0.0 through 2.3.37 - Apache Struts (org.apache.struts:struts2-core) 2.5.0 through 2.5.33 - Apache Struts (org.apache.struts:struts2-core) 6.0.0 through 6.10.0 - Apache Struts (org.apache.struts:struts2-core) 7.0.0 through 7.2.1
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. Credit: Kuniyoshi Noguchi (野口 晋義), (@KuniNogu) (finder) References: https://cwiki.apache.org/confluence/display/WW/S2-074 https://www.cve.org/CVERecord?id=CVE-2026-73635 On behalf of the Apache Struts project Łukasz Lenart
