Advisory Database
  • Advisories
  • Dependency Scanning
  1. npm
  2. ›
  3. @studiocms/s3-storage
  4. ›
  5. CVE-2026-32101

CVE-2026-32101: StudioCMS S3 Storage Manager Authorization Bypass via Missing `await` on Async Auth Check

March 12, 2026

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.

References

  • github.com/advisories/GHSA-mm78-fgq8-6pgr
  • github.com/withstudiocms/studiocms
  • github.com/withstudiocms/studiocms/security/advisories/GHSA-mm78-fgq8-6pgr
  • nvd.nist.gov/vuln/detail/CVE-2026-32101

Code Behaviors & Features

Detect and mitigate CVE-2026-32101 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions before 0.3.1

Fixed versions

  • 0.3.1

Solution

Upgrade to version 0.3.1 or above.

Impact 7.6 HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

Learn more about CVSS

Weakness

  • CWE-863: Incorrect Authorization

Source file

npm/@studiocms/s3-storage/CVE-2026-32101.yml

Spotted a mistake? Edit the file on GitLab.

  • Site Repo
  • About GitLab
  • Terms
  • Privacy Statement
  • Contact

Page generated Tue, 24 Mar 2026 12:16:50 +0000.