Detections
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SCA: security update for io.undertow:undertow-core (GHSA-j382-5jj3-vw4j)

critical Tenable Self-Hosted Container Security Plugin ID 436868

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2025-12543)

Solution

Update the io.undertow:undertow-core library and its related packages to version 2.2.39.Final or later.

See Also

https://github.com/advisories/GHSA-j382-5jj3-vw4j

Plugin Details

Severity: Critical

ID: 436868

Version: Revision 1.13

Type: Local

Family: SCA Checks

Published: 1/21/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.14

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2025-12543

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 1/7/2026

Vulnerability Publication Date: 1/7/2026

Reference Information

CVE: CVE-2025-12543

cwe: CWE-20