CVE-2026-86119
Webstudio through 0.296.0 SSRF via /cgi proxy routes
CVSS Score
8.6
EPSS Score
0.0%
EPSS Percentile
0th
Webstudio through 0.296.0 contains an unauthenticated server-side request forgery vulnerability in the /cgi/image, /cgi/video, and /cgi/asset proxy routes when RESIZE_ORIGIN environment variable is unset. Attackers can supply arbitrary URLs to these endpoints to read cloud instance metadata, access internal services, and perform network reconnaissance on the instance infrastructure.
| CWE | CWE-918 |
| Vendor | webstudio-is |
| Product | webstudio |
| Published | Sep 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
webstudio-is / webstudio
0 ≤ 0.296.0
References
github.com: https://github.com/webstudio-is/webstudio/issues/5816 github.com: https://github.com/webstudio-is/webstudio/blob/55920c57c4d3e128a0fa48fceabbbc3a1d73f1ef/apps/builder/app/routes/cgi.image.$.ts github.com: https://github.com/webstudio-is/webstudio/blob/55920c57c4d3e128a0fa48fceabbbc3a1d73f1ef/apps/builder/app/routes/cgi.video.$.ts github.com: https://github.com/webstudio-is/webstudio/blob/55920c57c4d3e128a0fa48fceabbbc3a1d73f1ef/apps/builder/app/routes/cgi.asset.$.ts github.com: https://github.com/webstudio-is/webstudio vulncheck.com: https://www.vulncheck.com/advisories/webstudio-through-0.296.0-ssrf-via-cgi-proxy-routes
Credits
🔍 George Chen