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TI-2026-76925 Aliases CVE-2026-113596GHSA-r95x-94xh-ccwh

Missing authorization in Webstudio exposes other users' project data

Priority LOW 12CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Webstudio before 0.256.0 lacks an authorization check that lets authenticated users read other users' project data. An authenticated user who knows another user's project UUID can query the tRPC handler through the publishedBuilds and findManyByIds procedures to retrieve publish history, titles, domains, preview images and latest builds. The flaw is classified as an authorization bypass through a user-controlled key (CWE-639).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00351 28th percentileScored 2026-11-07
Fix Fixed webstudio (webstudio-is): 0.256.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
webstudio-iswebstudiobefore 0.256.00.256.0Patch availableCNA
  • webstudio Vendorwebstudio-is Affected before 0.256.0 Fixed in 0.256.0 Patch available CNA

Remediation

Upgrade webstudio to version 0.256.0 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA webstudio (webstudio-is) Fixed in 0.256.0

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-113596
  2. 2026-10-21 Alias added: GHSA-r95x-94xh-ccwh
  3. 2026-10-23 CISA SSVC decision points changed

References

Patch 1

Other 4

  • TI-2026-58918 Webstudio through 0.296.0 SSRF via /cgi proxy routes CVSS 4.0CRITICAL 9.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences