Vulnerability · Published Sep 5, 2026 · Assigned by VulnCheck

CVE-2026-86119Webstudio through 0.296.0 SSRF via /cgi proxy routes

High 8.6

In plain English

A high-severity server-side request forgery 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 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.6%top 52.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
webstudio-is	webstudio	0 – through 0.296.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References

GitHub Issue #5816 issue-tracking
cgi.image.$.ts absolute-URL fetch branch technical-description
cgi.video.$.ts absolute-URL fetch branch technical-description
cgi.asset.$.ts absolute-URL fetch branch technical-description
https://github.com/webstudio-is/webstudio product
VulnCheck Advisory: Webstudio through 0.296.0 SSRF via /cgi proxy routes third-party-advisory