What is CVE-2026-123490?

CVE-2026-123490 is a high-severity vulnerability in Craftcms Cms, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 8.8/10. Published 2026-11-06.

How severe is CVE-2026-123490?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Craftcms Cms

CVE-2026-123490

Craft CMS from 5.8.17 before 5.11.2 contains a privilege escalation vulnerability because getOwners() applies caller criteria without cleansing the query configuration. Authenticated control panel users can invoke attacker-selected static PHP callables via crafted criteria to promote every account to administrator.

Vulnerability class: Mass Assignment

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Craftcms Cms

Weakness classification (CWE)

CWE-915 — Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

GitHub Security Advisory (GHSA-r56r-f696-c8w9) (vendor-advisory)
VulnCheck Advisory: Craft CMS before 5.11.2 Privilege Escalation via getOwners() Sandbox Bypass (third-party-advisory)

Frequently asked questions

What is CVE-2026-123490?: CVE-2026-123490 is a high-severity vulnerability in Craftcms Cms, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 8.8/10. Published 2026-11-06.
How severe is CVE-2026-123490?: High severity. CVSS v3 base score is 8.8 out of 10.