{"action":"Upgrade terriajs-server to 4.0.3 or later.","affected":[{"fixed":"4.0.3","introduced":"0"}],"component":"terriajs-server","cve_ids":["CVE-2026-27818"],"ecosystem":"npm","epss":0.00416,"exploited":false,"fixed_versions":["4.0.3"],"ghsa_id":"GHSA-w789-49fc-v8hr","id":"tcs_01M5KGE97Z2Z9A3B7P1R8T2PCE","modified_at":"2026-02-26T15:32:54.424919Z","published_at":"2026-02-26T15:22:11Z","references":["https://osv.dev/vulnerability/GHSA-w789-49fc-v8hr","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"],"severity":{"label":"high"},"sources":[{"source":"osv","source_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"}