What is the CVSS score of CVE-2026-39942?

CVE-2026-39942 has a CVSS 3.1 base score of 8.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Directus are affected by CVE-2026-39942?

Directus versions below 11.17.0 contain an authenticated file overwrite vulnerability (CVSS 8.5) that allows low-privileged users to corrupt arbitrary files and manipulate metadata, creating risk of…. A patch is available.

How to fix or mitigate CVE-2026-39942?

Within 24 hours: Identify all Directus deployments and confirm version numbers below 11.17.0; restrict access to /files/{id} PATCH endpoints to administrative users only via authentication controls. Within 7 days: Audit file modification logs for suspicious filename_disk parameter manipulation and metadata changes (uploaded_by field alterations); quarantine any evidence of tampering. Within 30 days: Upgrade all Directus instances to version 11.17.0 or later; restore files from verified backups created before exploitation window if tampering confirmed.

Directus CVE-2026-39942

EUVD-2026-20950 HIGH

Improper Access Control (CWE-284)

2026-04-09 GitHub_M

GHSA-393c-p46r-7c95

Authentication Bypass Directus

8.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.5 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

High

Availability

None

Lifecycle Timeline

Patch released

Apr 09, 2026 - 20:30 nvd

Patch available

EUVD ID Assigned

Apr 09, 2026 - 16:30 euvd

EUVD-2026-20950

Analysis Generated

Apr 09, 2026 - 16:30 vuln.today

CVE Published

Apr 09, 2026 - 16:07 nvd

HIGH 8.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

3 npm packages depend on directus (1 direct, 2 indirect)

Ecosystem-wide dependent count for version 11.17.0.

DescriptionGitHub Advisory

Directus is a real-time API and App dashboard for managing SQL database content. Prior to 11.17.0, the PATCH /files/{id} endpoint accepts a user-controlled filename_disk parameter. By setting this value to match the storage path of another user's file, an attacker can overwrite that file's content while manipulating metadata fields such as uploaded_by to obscure the tampering. This vulnerability is fixed in 11.17.0.

AnalysisAI

{id} requests. Attackers can overwrite other users' file content and forge metadata fields (e.g., uploaded_by) to hide evidence of tampering. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate as low-privileged user

Delivery

Send PATCH request to /files/{id}

Exploit

Set filename_disk to target file path

Execution

Overwrite victim file content

Impact

Manipulate uploaded_by metadata to hide tampering