Improper Input Validation Affecting wildfly package, versions <39.0.0-r0


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
1.2% (66th percentile)

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  • Snyk IDSNYK-WOLFILATEST-WILDFLY-15421262
  • published5 Mar 2026
  • disclosed7 Jan 2026

Introduced: 7 Jan 2026

CVE-2025-12543  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Wolfi wildfly to version 39.0.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wildfly package and not the wildfly package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without rejection, enabling attackers to poison caches, perform internal network scans, or hijack user sessions.

CVSS Base Scores

version 3.1