Flextype v1.0.0-alpha.3 NULL access_token Authentication Bypass

Flextype CMS v1.0.0-alpha.3 API endpoints accept a NULL access_token because isset() validation lets requests bypass authentication.

Flextype CMS v1.0.0-alpha.3 API endpoints can declare access_token as a required parameter, but required-parameter validation only verifies the key exists in the request data. Authentication is then verified inside an isset($data['access_token']) condition, which in PHP treats a NULL value as absent. This allows requests supplying a NULL access_token to bypass authentication on affected endpoints. The flaw was disclosed on the Full Disclosure mailing list on September 3, 2026.

• Required-parameter validation only checks key presence, not a valid non-empty token value
• isset($data['access_token']) treats NULL as absent, allowing authentication bypass
• No CVE identifier, patch, or exploitation evidence is referenced in the disclosure