How severe is CVE-2026-27818?

The severity of CVE-2026-27818 has not been assessed with CVSS v3.

CVE-2026-27818

NONE

Published: 2/26/2026Updated: 2/26/2026

Description

TerriaJS-Server is a NodeJS Express server for TerriaJS, a library for building web-based geospatial data explorers. A validation bug in versions prior to 4.0.3 allows an attacker to proxy domains not explicitly allowed in the `proxyableDomains` configuration. Version 4.0.3 fixes the issue.

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References

https://github.com/TerriaJS/terriajs-server/commit/3aaa5d9717162b245ae4569232bbe7d8673c913f
https://github.com/TerriaJS/terriajs-server/security/advisories/GHSA-w789-49fc-v8hr