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OpenAdvisories
Medium · 5.3 CVE-2026-28782 EUVD-2026-9449GHSA-jxm3-pmm2-9gf6

Craft has a Permission Bypass and IDOR in Duplicate Entry Action

Published Mar 4, 2026 · Updated Mar 4, 2026 · Assigned by GitHub_M

Description

Craft is a content management system (CMS). Prior to 5.9.0-beta.1 and 4.17.0-beta.1, the "Duplicate" entry action does not properly verify if the user has permission to perform this action on the specific target elements. Even with only "View Entries" permission (where the "Duplicate" action is restricted in the UI), a user can bypass this restriction by sending a direct request. Furthermore, this vulnerability allows duplicating other users' entries by specifying their Entry IDs. Since Entry IDs are incremental, an attacker can trivially brute-force these IDs to duplicate and access restricted content across the system. This vulnerability is fixed in 5.9.0-beta.1 and 4.17.0-beta.1.

Affected products

VendorProductAffectedFixed
craftcms cms >= 5.0.0-RC1, < 5.9.0-beta.1, >= 4.0.0-RC1, < 4.17.0-beta.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist craftcms/cms >= 5.0.0-RC1, < 5.9.0-beta.1 5.9.0-beta.1 GHSA-jxm3-pmm2-9gf6
Packagist craftcms/cms >= 4.0.0-RC1, < 4.17.0-beta.1 4.17.0-beta.1 GHSA-jxm3-pmm2-9gf6

References