๐Ÿ›ก๏ธ CVE-2025-12543
๐Ÿ”ด CVSS 9.6 โ€” Critical โœ… No Known Exploit CWE-20 NVD
9.6
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 9.6
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
CWE CWE-20
Public Exploit โœ… No
Source NVD
Published 2026-01-07
Updated 2026-06-15
Modified 2026-03-18
Fix URL N/A

Affected Packages

Software From version Fixed in
build-of-apache-camel โ€” 4.14.4
data-grid โ€” โ€”
fuse โ€” โ€”
io.undertow:undertow-core โ€” 2.2.39.Final
jboss-enterprise-application-platform โ€” โ€”
jboss-enterprise-application-platform-expansion-pack โ€” โ€”
process-automation โ€” โ€”
single-sign-on โ€” โ€”
undertow 2.3.0 2.3.21

References

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