Server-side Request Forgery (SSRF) Affecting terriajs-server package, versions <4.0.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Server-side Request Forgery (SSRF) vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-JS-TERRIAJSSERVER-15363321
- published27 Feb 2026
- disclosed26 Feb 2026
- creditUnknown
Introduced: 26 Feb 2026
NewCVE-2026-27818 (opens in a new tab)How to fix?
Upgrade terriajs-server to version 4.0.3 or higher.
Overview
terriajs-server is a basic NodeJS Express server that serves up a (not included) static TerriaJS-based site (such as National Map) with a few additional useful services.
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) due to improper validation in the proxyableDomains configuration. An attacker can bypass domain restrictions by registering a domain with a name that ends with an allowed domain and proxy unauthorized content through the server.