GHSA-w789-49fc-v8hr
TerriaJS-Server has a domain validation bypass vulnerability in its proxy allowlist
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | terriajs-server | < 4.0.3 | 4.0.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
A validation bug allows an attacker to proxy domains not explicitly allowed in the `proxyableDomains` configuration.
The validation only checks if a hostname _ended_ with an allowed domain. This meant:
If `example.com` is allowed in `proxyableDomains`:
- ✅ example.com is allowed (correct)
- ✅ api.example.com is allowed (correct)
- ⚠️ maliciousexample.com is allowed (incorrect)
An attacker could register maliciousexample.com and proxy content through `terriajs-server`, bypassing proxy restrictions.
### Patches
All versions up to 4.0.2 are affected. Upgrade to 4.0.3 to address the vulnerability.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/TerriaJS/terriajs-server/security/advisories/GHSA-w789-49fc-v8hr
- https://nvd.nist.gov/vuln/detail/CVE-2026-27818
- https://github.com/TerriaJS/terriajs-server/commit/3aaa5d9717162b245ae4569232bbe7d8673c913f
- https://github.com/TerriaJS/terriajs-server
- https://github.com/TerriaJS/terriajs-server/releases/tag/4.0.3