What is CVE-2026-19646?

CVE-2026-19646 is a critical-severity vulnerability in IBM Common Licensing, classified under CWE-1149. CVSS score: 9.1/10. Published 2026-09-10.

How severe is CVE-2026-19646?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in IBM Common Licensing

CVE-2026-19646

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 v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Ibm Common Licensing — versions ART 9.0, ART 9.0.0.1, ART 9.0.0.2

Weakness classification (CWE)

CWE-1149

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-19646?: CVE-2026-19646 is a critical-severity vulnerability in IBM Common Licensing, classified under CWE-1149. CVSS score: 9.1/10. Published 2026-09-10.
How severe is CVE-2026-19646?: Critical severity. CVSS v3 base score is 9.1 out of 10.