CVE-2026-50283: Craft CMS: Unauthorized Deletion of Source Assets During File Replacement

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

• craftcms cms

  • >= 5.0.0-RC1, < 5.9.21, >= 4.0.0-RC1, < 4.17.14affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-112776Craft CMS 5.0.0 before 5.11.0 GraphQL Site-Scope Bypass via Mutations
  37Monitor
• CVE-2026-72785Craft CMS before 5.10.6 Authorization Bypass via structures/move-element
  37Monitor
• CVE-2026-84795Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance
  36Monitor

Published before and after this one in the same product

• ← EarlierCVE-2026-56394Jun 21, 2026 · Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter
  28Monitor
• ← EarlierCVE-2026-55793Jul 1, 2026 · Craft CMS: Stored XSS via Structure entry title in table view
  23Monitor
• Later →CVE-2026-50284Jul 1, 2026 · Craft CMS: Missing peer-permission check in `AssetsController::actionDeleteFolder` allows deletion of other users' assets
  28Monitor

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const invoice = await Invoice.findById(req.params.id);2res.json(invoice);

1const invoice = await Invoice.findOne({2  id: req.params.id,3  ownerId: req.user.id,4});5if (!invoice) return res.sendStatus(404);6res.json(invoice);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.