Apache Struts: Disproportionate response size when rendering BigDecimal request parameters
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.
CVE-2026-104712
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-104712
Apache Struts
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Apache Software Foundation",
"product": "Apache Struts",
"versions": [
{
"status": "affected",
"version": "2.5.14",
"versionType": "semver",
"lessThanOrEqual": "2.5.33"
},
{
"status": "affected",
"version": "6.0.0",
"versionType": "semver",
"lessThanOrEqual": "6.11.0"
},
{
"status": "affected",
"version": "7.0.0",
"versionType": "semver",
"lessThanOrEqual": "7.3.0"
}
],
"packageURL": "pkg:maven/org.apache.struts/struts2-core",
"packageName": "org.apache.struts:struts2-core",
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-104712
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #9307 · Revision 1
- Added to Heist Feed
- Publisher date