{"cve":"CVE-2026-27818","nvd":{"published":"2026-02-26T00:16:26.653","modified":"2026-06-17T10:27:44.177","status":"Analyzed","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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-20","CWE-918"],"references":["https://github.com/TerriaJS/terriajs-server/commit/3aaa5d9717162b245ae4569232bbe7d8673c913f","https://github.com/TerriaJS/terriajs-server/security/advisories/GHSA-w789-49fc-v8hr"],"products":["terria:terriajs-server"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-27818","score":0.0028,"percentile":0.20552,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-w789-49fc-v8hr","url":"https://osv.dev/vulnerability/GHSA-w789-49fc-v8hr","summary":"TerriaJS-Server has a domain validation bypass vulnerability in its proxy allowlist","modified":"2026-02-26T15:32:54.424919Z","packages":[{"ecosystem":"npm","name":"terriajs-server","purl":"pkg:npm/terriajs-server","ranges":["<4.0.3"],"fixed":["4.0.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}