IBM Common Licensing Agent HTTP Host Header Redirect Vulnerability

Publication date: 2026-09-10

Last updated on: 2026-09-10

Assigner: IBM Corporation

Description

IBM Common Licensing Agent 9.0, Agent 9.0.0.1, Agent 9.0.0.2, ART 9.0, ART 9.0.0.1, and ART 9.0.0.2 could allow a remote attacker to redirect users to an arbitrary domain due to improper validation of the HTTP Host header.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-10

Last Modified

2026-09-10

Generated

2026-09-11

AI Q&A

2026-09-11

EPSS Evaluated

N/A

NVD

CVE-2026-19646

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	common_licensing_agent	9.0
ibm	common_licensing_agent	9.0.0.1
ibm	common_licensing_agent	9.0.0.2
ibm	art	9.0
ibm	art	9.0.0.1
ibm	art	9.0.0.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1149

Attack-Flow Graph

Executive Summary

IBM Common Licensing Agent versions 9.0, 9.0.0.1, 9.0.0.2, ART 9.0, ART 9.0.0.1, and ART 9.0.0.2 are vulnerable to a flaw where a remote attacker can manipulate the HTTP Host header to redirect users to an arbitrary domain. This occurs due to improper validation of the Host header.

Impact Analysis

This vulnerability could allow attackers to trick users into visiting malicious domains, potentially leading to phishing attacks, credential theft, or malware downloads. Users might unknowingly interact with harmful content if redirected.

Mitigation Strategies

Update IBM Common Licensing Agent and ART to the latest patched versions to address improper HTTP Host header validation.

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