What is CVE-2026-124427?

CVE-2026-124427 is a critical-severity vulnerability in Craftcms Cms, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-11-08.

How severe is CVE-2026-124427?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Craftcms Cms

CVE-2026-124427

Craft CMS from 5.0.0 before 5.11.2 contains an authorization bypass vulnerability that allows anonymous GraphQL clients to read out-of-scope section entries via prev/next fields. Attackers can chain next hops from one visible in-scope entry to enumerate entries and read titles, slugs, and custom-field content from withheld sections.

Vulnerability class: Broken Access Control

Published 2026-11-08.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/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-862 — Missing Authorization

References

GitHub Security Advisory (GHSA-xpg7-m6gm-4xfh) (vendor-advisory)
VulnCheck Advisory: Craft CMS 5.0.0 before 5.11.2 GraphQL Schema Scope Bypass via prev/next (third-party-advisory)

Frequently asked questions

What is CVE-2026-124427?: CVE-2026-124427 is a critical-severity vulnerability in Craftcms Cms, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-11-08.
How severe is CVE-2026-124427?: Critical severity. CVSS v3 base score is 9.8 out of 10.