Advisory details:
github_osv / GHSA-qqmv-5p3g-px89
| Advisory ID | github_osv/GHSA-qqmv-5p3g-px89 |
| Aliases |
CVE-2026-35412
|
| Summary | Directus: TUS Upload Authorization Bypass Allows Arbitrary File Overwrite ## 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](https://bugbunny.ai). |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 6.4 |
| Risk | 3.2 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| CWE-863 | Incorrect Authorization |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 7.1 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-qqmv-5p3g-px89/GHSA-qqmv-5p3g-px89.json |
| generic_textual | HIGH |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/directus/directus | ||
| https://github.com/directus/directus/security/advisories/GHSA-qqmv-5p3g-px89 | ||
| CVE-2026-35412 | https://nvd.nist.gov/vuln/detail/CVE-2026-35412 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-07T16:23:08Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/35xxx/CVE-2026-35412.json
Source Advisory: vulnrichment/CVE-2026-35412
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]