PT-2026-30329 · Npm · Directus

Published

2026-04-04

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Updated

2026-04-04

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CVE-2026-35412

CVSS v3.1

7.1

High

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Summary

Directus' TUS resumable upload endpoint (/files/tus) allows any authenticated user with basic file upload permissions to overwrite arbitrary existing files by UUID. The TUS controller performs only collection-level authorization checks, verifying the user has some permission on directus files, but never validates item-level access to the specific file being replaced. As a result, row-level permission rules (e.g., "users can only update their own files") are completely bypassed via the TUS path while being correctly enforced on the standard REST upload path.

Impact

  • Arbitrary file overwrite: Any authenticated user with basic TUS upload permissions can overwrite any file in directus files by UUID, regardless of row-level permission rules.
  • Permanent data loss: The victim file's original stored bytes are deleted from storage and replaced with attacker-controlled content.
  • Metadata corruption: The victim file's database record is updated with the attacker's filename, type, and size metadata. Privilege escalation potential: If admin-owned files (e.g., application assets, templates) are stored in directus files, a low-privilege user could replace them with malicious content.

Workaround

Disable TUS uploads by setting TUS ENABLED=false if resumable uploads are not required.

Credit

This vulnerability was discovered and reported by bugbunny.ai.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-35412
GHSA-QQMV-5P3G-PX89

Affected Products

Directus