How severe is CVE-2026-39942?

CVE-2026-39942 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2026-39942 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39942?

CVE-2026-39942 affects Monospace Directus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39942?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-39942 have an EU (EUVD) identifier?

Yes. CVE-2026-39942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20950.

When was CVE-2026-39942 published?

CVE-2026-39942 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-39942

CVE-2026-39942 is a high-severity vulnerability in Monospace Directus with a CVSS 3.x base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 8.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20950
Weakness: CWE-284
Affected product: Monospace Directus
Published: 2026-04-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-39942?: 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.
How severe is CVE-2026-39942?: CVE-2026-39942 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2026-39942 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39942?: CVE-2026-39942 affects Monospace Directus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39942?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-39942 have an EU (EUVD) identifier?: Yes. CVE-2026-39942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20950.
When was CVE-2026-39942 published?: CVE-2026-39942 was published on 2026-04-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:monospace:directus:*:*:*:*:*:node.js:*:*

More vulnerabilities in Monospace Directus

CVE-2022-26969 — Critical (CVSS 9.8): In Directus before 9.7.0, the default settings of CORS_ORIGIN and CORS_ENABLED are true.
CVE-2025-55746 — Critical (CVSS 9.3): Directus is a real-time API and App dashboard for managing SQL database content. From 10.8.0 to before 11.9.3, a…
CVE-2026-35408 — High (CVSS 8.7): Directus is a real-time API and App dashboard for managing SQL database content. Prior to 11.17.0, Directus's Single…
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CVE-2025-30353 — High (CVSS 8.6): Directus is a real-time API and App dashboard for managing SQL database content. Starting in version 9.12.0 and prior…
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