CVE-2026-32104 StudioCMS: IDOR in User Notification Preferences Allows Any Authenticated User to Modify Any User's Settings
Authenticated users can modify any other user's notification settings, potentially disabling admin alerts to hide malicious activity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-32104?
CVE-2026-32104 is a medium-severity missing authorization vulnerability in withstudiocms studiocms, published on 11 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.4.3, the updateUserNotifications endpoint accepts a user ID from the request payload and uses it to update that user's notification preferences. It checks that the caller is logged in but never verifies that the caller owns the target account (id !== userData.user.id). Any authenticated visitor can modify notification preferences for any user, including disabling admin notifications to suppress detection of malicious activity. This vulnerability is fixed in 0.4.3.
Weakness: CWE-639
Which versions are affected by CVE-2026-32104?
2 open source packages ship an affected version, including studiocms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
studiocms npm | All versions | 0.4.3 |
studiocms npm | All versions | 0.4.3 |
Products include Studiocms Studiocms.
How do I fix CVE-2026-32104?
Upgrade studiocms to 0.4.3 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-32104 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32104 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-9v82-xrm4-mp52.