Auth bypass in Webstudio-Is Webstudio
CVE-2026-113596
Webstudio before 0.256.0 contains a missing authorization vulnerability that allows authenticated users to read other users' project data via the publishedBuilds and findManyByIds tRPC procedures. Attackers who know another user's project UUID can query the /trpc handler to retrieve publish history, titles, domains, preview images, and latest builds.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/webstudio-is/webstudio/issues/5621 (issue-tracking)
- github.com/webstudio-is/webstudio/commit/348d049ed2763d2b6c3e00319fa9086ca67c8a… (patch)
- github.com/webstudio-is/webstudio/releases/tag/0.256.0 (release-notes)
- github.com/webstudio-is/webstudio/blob/0.255.0/packages/project/src/trpc/projec… (technical-description)
- github.com/webstudio-is/webstudio/blob/0.255.0/packages/dashboard/src/db/projec… (technical-description)
- www.vulncheck.com/advisories/webstudio-before-0.256.0-information-disclosure-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-113596?
- CVE-2026-113596 is a low-severity vulnerability in Webstudio-Is Webstudio, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 3.1/10. Published 2026-10-20.
- How severe is CVE-2026-113596?
- Low severity. CVSS v3 base score is 3.1 out of 10.