{"id":"CVE-2026-118660","revision":"a248594ac62942358655fdc2f29bc76a","records":[{"revision":"a248594ac62942358655fdc2f29bc76a","observedAt":"2026-10-29T19:28:49.708+00:00","statement":{"source":"cve-program","id":"CVE-2026-118660","aliases":[],"title":"Happy DOM: SSRF via iframe and link stylesheet when parsing untrusted HTML","description":"Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.0, Happy DOM loads iframe src URLs and link rel=\"stylesheet\" href URLs by default while parsing untrusted HTML on the server because disableIframePageLoading and disableCSSFileLoading default to false. An attacker who controls parsed HTML can therefore cause server-side requests to arbitrary internal or cloud endpoints without an application opt-in and may expose confidential responses or credentials returned by those endpoints. This issue is fixed in version 21.0.0.","state":0,"publishedAt":"2026-10-28T20:23:10.122+00:00","modifiedAt":"2026-10-29T17:23:32.163+00:00","affected":[{"ecosystem":"Vendor product","name":"happy-dom","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"capricorn86\",\n                    \"product\": \"happy-dom\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 21.0.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6,"severity":"HIGH"}],"references":["https://github.com/capricorn86/happy-dom/security/advisories/GHSA-c8p4-j97h-3vg8","https://github.com/capricorn86/happy-dom/pull/2502","https://github.com/capricorn86/happy-dom/commit/0a99c7525a1d0043e3182843ae33466ab7b19e74","https://github.com/capricorn86/happy-dom/releases/tag/v21.0.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118660","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118660","identifiers":["CVE-2026-118660"]},"retained":false,"historicalAffected":[]}],"coverage":[]}