CVE-2026-22707
Strapi is an open source headless content management system.
Published May 14, 2026 · corrected/updated Jun 17, 2026 · strapi strapi · evidence confidence high
Strapi is an open source headless content management system. In Strapi versions prior to 5.33.3, the Upload plugin's Content API endpoints did not enforce the administrator-configured MIME type restrictions ( and ). The same restrictions were correctly enforced on the Admin Panel upload path. The upload plugin's security check was invoked in the admin upload controller but was missing from the Content API controller. The Content API handlers and (and the wrapper that dispatches to them) called the underlying upload service directly, bypassing both the magic-byte MIME detection and the configured allow/deny lists. An authenticated user with the Content API upload permission could therefore upload file types the administrator had explicitly disallowed, including HTML and SVG content. In deployments serving uploaded files from the same origin as the admin panel (default), an attacker could upload an HTML or SVG file that, when opened directly by an admin, executed JavaScript in the admin origin, enabling admin-session hijack and authenticated administrative actions against the admin API. The patch in version 5.33.3 introduces a shared helper that wraps and is called from both the Content API and admin upload controllers, ensuring identical security policy enforcement on every upload entry point.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-22707 is a medium public vulnerability record for strapi strapi. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether strapi strapi is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: strapi/strapi. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 5.3, EPSS 0.2%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-434, CWE-693. Sources contributing to this record: cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
May 14, 2026 · NIST NVD
Detected
Strapi is an open source headless content management system. In Strapi versions prior to 5.33.3, the Upload plugin's Content API endpoints did not enforce the administrator-configured MIME type restrictions ( and ). The same restrictions were correctly enforced on the Admin Panel upload path. The upload plugin's security check was invoked in the admin upload controller but was missing from the Con
Jun 17, 2026 · NIST NVD
Updated
Strapi is an open source headless content management system. In Strapi versions prior to 5.33.3, the Upload plugin's Content API endpoints did not enforce the administrator-configured MIME type restrictions ( and ). The same restrictions were correctly enforced on the Admin Panel upload path. The upload plugin's security check was invoked in the admin upload controller but was missing from the Con
Affected
- cpe strapi/strapiversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-22707
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-22707
30-day exploitation probability 0.2%
first.org - NIST NVDVulnerability recordCVE-2026-22707
Strapi is an open source headless content management system. In Strapi versions prior to 5.33.3, the Upload plugin's Content API endpoints did not enforce the administrator-configured MIME type restrictions ( and ). The same restr
nvd.nist.gov