---
id: CVE-2026-104712
title: Asymmetric resource consumption (amplification) vulnerability in Apache Struts
summary: >-
  Asymmetric resource consumption (amplification) vulnerability in Apache
  Struts. When a request parameter is bound to an arbitrary-precision decimal
  (java.math.BigDecimal) property that is then rendered through the Struts tag
  library, the…
severity: none
cwe:
  - CWE-405
vendor: Apache Software Foundation
product: 'org.apache.struts:struts2-core'
affected:
  - 'org.apache.struts:struts2-core >= 2.5.14 <= 2.5.33'
  - 'org.apache.struts:struts2-core >= 6.0.0 <= 6.11.0'
  - 'org.apache.struts:struts2-core >= 7.0.0 <= 7.3.0'
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T20:17:08.940'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104712'
references:
  - url: 'https://cwiki.apache.org/confluence/display/WW/S2-076'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/05/11'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-05T19:30:59.977Z'
---

## Overview

Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.

This issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.

Users are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.