CVE-2026-32638 StudioCMS REST getUsers Exposes Owner Account Records to Admin Tokens
Admin tokens can bypass authorization checks to view owner account details via the getUsers endpoint, exposing sensitive user information.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-32638?
CVE-2026-32638 is a low-severity missing authorization vulnerability in withstudiocms studiocms, published on 18 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.4.4, the REST API `getUsers` endpoint in StudioCMS uses the attacker-controlled `rank` query parameter to decide whether owner accounts should be filtered from the result set. As a result, an admin token can request `rank=owner` and receive owner account records, including IDs, usernames, display names, and email addresses, even though the adjacent `getUser` endpoint correctly blocks admins from viewing owner users. This is an authorization inconsistency inside the same user-management surface. Version 0.4.4 fixes the issue.
Weakness: CWE-639
Which versions are affected by CVE-2026-32638?
2 open source packages ship an affected version, including studiocms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
studiocms npm | All versions | 0.4.4 |
studiocms npm | All versions | 0.4.4 |
Products include Studiocms Studiocms.
How do I fix CVE-2026-32638?
Upgrade studiocms to 0.4.4 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-32638 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32638 exists.
Other vulnerabilities in withstudiocms studiocms
- CVE-2026-30944 StudioCMS Affected by Privilege Escalation via Insecure API Token Generation
- CVE-2026-32101 StudioCMS S3 Storage Manager Authorization Bypass via Missing `await` on Async Auth Check
- CVE-2026-30945 StudioCMS: IDOR — Arbitrary API Token Revocation Leading to Denial of Service
- CVE-2026-32103 StudioCMS: IDOR — Admin-to-Owner Account Takeover via Password Reset Link Generation
- CVE-2026-24134 StudioCMS has an Authorization Bypass Through User-Controlled Key
Sources
Also known as GHSA-xvf4-ch4q-2m24.