What is CVE-2026-18544?

CVE-2026-18544 is a high-severity vulnerability in IBM Portieris, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-08-19.

How severe is CVE-2026-18544?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in IBM Portieris

CVE-2026-18544

IBM Portieris 0.5.0 through 0.14.2 could allow a remote authenticated attacker to bypass image policy enforcement due to improper authorization of pod owner references.

Vulnerability class: Broken Access Control

Published 2026-08-19 · last modified 2026-09-02.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (34.9th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

IBM Portieris

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

www.ibm.com/support/pages/node/7284125 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-18544?: CVE-2026-18544 is a high-severity vulnerability in IBM Portieris, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-08-19.
How severe is CVE-2026-18544?: High severity. CVSS v3 base score is 8.1 out of 10.