CVE-2026-86119
Webstudio through 0.296.0 SSRF via /cgi proxy routes
- State
- Published
- Severity
- 9.2 Critical
- Published
- Sep 5, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 5, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N | VulnCheck |
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
webstudiowebstudio-is |
|
References
- GitHub Issue #5816issue-tracking
- cgi.image.$.ts absolute-URL fetch branchtechnical-description
- cgi.video.$.ts absolute-URL fetch branchtechnical-description
- cgi.asset.$.ts absolute-URL fetch branchtechnical-description
- https://github.com/webstudio-is/webstudioproduct
- VulnCheck Advisory: Webstudio through 0.296.0 SSRF via /cgi proxy routesthird-party-advisory
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