CVE-2026-113596: Authorization Bypass Through User-Controlled Key in webstudio-is webstudio
Description
Webstudio versions before 0.256.0 have an authorization bypass vulnerability that allows authenticated users to access other users' project data. This occurs via the publishedBuilds and findManyByIds tRPC procedures. An attacker who knows another user's project UUID can retrieve sensitive project information such as publish history, titles, domains, preview images, and latest builds.
CVSS v4.0
Score 2.3low
Affected software
webstudio-is
webstudio
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-113596 is a missing authorization vulnerability in webstudio before version 0.256.0. Authenticated users can exploit this flaw by using the publishedBuilds and findManyByIds tRPC procedures to read project data belonging to other users if they know the target user's project UUID. The exposed data includes publish history, project titles, domains, preview images, and latest builds. This vulnerability arises from insufficient access control checks on these API endpoints.
Potential Impact
The vulnerability allows unauthorized disclosure of project data across users within the webstudio application. While exploitation requires authentication and knowledge of a target project UUID, it can lead to privacy breaches and information leakage of project metadata and build artifacts. The CVSS score of 2.3 indicates a low severity impact.
Mitigation Recommendations
A fix is available in webstudio version 0.256.0 and later. Users should upgrade to version 0.256.0 or higher to remediate this authorization bypass vulnerability. No other mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-20T11:48:38.957Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad78d872cdf04f6563d76fb
Added to database: 10/20/2026, 15:49:27 UTC
Last enriched: 10/20/2026, 16:04:39 UTC
Last updated: 10/20/2026, 19:06:08 UTC
Views: 8
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