Vulnerability · Published Oct 20, 2026 · Assigned by VulnCheck

CVE-2026-113596Webstudio before 0.256.0 Information Disclosure via tRPC publishedBuilds and findManyByIds

Low 3.1

In plain English

A low-severity authorization bypass via user-controlled key in webstudio from webstudio-is. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.4%top 71.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
webstudio-is	webstudio	0 – before 0.256.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/webstudio-is/webstudio/issues/5621 issue-tracking
https://github.com/webstudio-is/webstudio/commit/348d049ed2763d2b6c3e00319fa9086ca67c8aa6 patch
webstudio 0.256.0 Release Notes release-notes
https://github.com/webstudio-is/webstudio/blob/0.255.0/packages/project/src/trpc/project-router.ts technical-description
https://github.com/webstudio-is/webstudio/blob/0.255.0/packages/dashboard/src/db/projects.ts technical-description
VulnCheck Advisory: Webstudio before 0.256.0 Information Disclosure via tRPC publishedBuilds and findManyByIds third-party-advisory