CVEvulnerability

CVE-2025-12543

9.6 CRITICAL Published 2026-01-07 Modified 2026-10-14 Official page ↗
Status
Modified
Published
2026-01-07
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.6 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
CVSS 3.1 ([email protected])
9.6 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
9.6 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Weaknesses
CWE-20

Description

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.

Affected configurations

• redhat build of apache camel (< 4.14.4) • redhat data grid 8.0 • redhat fuse 7.0.0 • redhat jboss enterprise application platform (>= 8.0 < 8.0.12) • redhat jboss enterprise application platform (>= 8.1.0 < 8.1.3) • redhat jboss enterprise application platform • redhat jboss enterprise application platform 7.0.0 • redhat jboss enterprise application platform expansion pack • redhat process automation 7.0 • redhat single sign-on 7.0 • redhat undertow (< 2.2.39) • redhat undertow (>= 2.3.0 < 2.3.21)

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References