What is CVE-2026-18527?

CVE-2026-18527 is a critical-severity vulnerability in IBM Administration Runtime Expert For I, classified under Session Fixation. CVSS score: 9.9/10. Published 2026-08-28.

How severe is CVE-2026-18527?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Vulnerability in IBM Administration Runtime Expert For I

CVE-2026-18527

IBM Administration Runtime Expert for i 1R1M0 IBM Application Runtime Expert (ARE) for i could allow a remote attacker to gain elevated privileges, caused by ARE GUI component processing. An unauthenticated attacker can exploit this vulnerability to execute actions under another user's authenticated profile gaining elevated privileges on the IBM i system.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ibm Administration Runtime Expert For I — versions 1R1M0

Weakness classification (CWE)

CWE-384 — Session Fixation

References

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

Frequently asked questions

What is CVE-2026-18527?: CVE-2026-18527 is a critical-severity vulnerability in IBM Administration Runtime Expert For I, classified under Session Fixation. CVSS score: 9.9/10. Published 2026-08-28.
How severe is CVE-2026-18527?: Critical severity. CVSS v3 base score is 9.9 out of 10.