CVE-2026-32101
Last modified
CVE-2026-32101 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.3.1, the S3 storage manager's isAuthorized() function is declared async (returns Promise<boolean>) but is called without await in both the POST and PUT handlers. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.3.1, the S3 storage manager's isAuthorized() function is declared async (returns Promise<boolean>) but is called without await in both the POST and PUT handlers. Since a Promise object is always truthy in JavaScript, !isAuthorized(type) always evaluates to false, completely bypassing the authorization check. Any authenticated user with the lowest visitor role can upload, delete, rename, and list all files in the S3 bucket. This vulnerability is fixed in 0.3.1.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Studiocms | Studiocms | < 0.3.1 |
References
- https://github.com/withstudiocms/studiocms/security/advisories/GHSA-mm78-fgq8-6pgrExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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