CVE-2026-104712
Description
Apache Struts can produce a response many orders of magnitude larger than the request when an attacker-controlled request parameter is bound to a java.math.BigDecimal property and that property is rendered through the Struts tag library. An unauthenticated remote attacker can use sustained, low-volume requests to exhaust server CPU and outbound network capacity, causing denial of service. Applications that do not use this binding-and-rendering path are not affected.
Statement
An unauthenticated remote attacker can cause denial of service when an application binds attacker-controlled request parameters to a java.math.BigDecimal property and renders that property through the Struts tag library. Disproportionate response expansion can consume server CPU and outbound network capacity. The impact is limited to availability; confidentiality and integrity are not affected. Applications that do not use this binding-and-rendering path are not affected. JSON and REST plugin responses and properties using other numeric types are outside the affected path. Red Hat rates this vulnerability Important (CVSS 7.5: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), reflecting its unauthenticated, low-complexity network attack path and high availability impact. Apache rates the issue Moderate.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | N/A | 7.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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