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


Severity

Recommended
0.0
critical
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
1.2% (66th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CHAINGUARDLATEST-WILDFLY-15111980
  • published27 Jan 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 Chainguard 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 Chainguard. See How to fix? for Chainguard 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