{"id":"CVE-2026-66300","summary":"SNOMED International Snowstorm reflected XSS","details":"SNOMED International Snowstorm contains a reflected XSS vulnerability within the \"Web Route\" redirection functionality. An attacker can inject arbitrary JavaScript which will execute upon a target user navigating to a crafted, malicious link. Fixed in 10.12.2 and 10.9.3.","modified":"2026-08-06T08:28:42.284781Z","published":"2026-08-04T18:51:27.626Z","database_specific":{"cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66300.json","cna_assigner":"cisa-cg"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66300.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66300"},{"type":"ADVISORY","url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-212-01.json"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2026-66300"},{"type":"FIX","url":"https://github.com/IHTSDO/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39"},{"type":"FIX","url":"https://github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ihtsdo/snowstorm","events":[{"introduced":"0"},{"fixed":"575b555695811110dafe2fcea7dd2fd7e4bcee39"},{"fixed":"b8061add427c930b3030549e77aa23ec5957ceb6"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"7.0.0"},{"fixed":"10.12.2"}]}}],"versions":["10.12.1","10.12.0","10.11.2","10.10.1","10.9.1","10.9.0","10.8.2","10.8.1","10.8.0","10.7.0","10.6.1","10.6.0","10.5.1","10.5.0","10.4.2","10.3.1","10.2.1","10.1.0","9.2.0","8.3.0","8.2.2","8.1.0","8.0.0","7.12.0","7.11.0","7.10.0","7.9.3","7.9.2","7.9.1","7.9.0","7.8.0","7.7.0","7.6.0","7.5.4","7.5.3","7.5.1","7.4.1","7.4.0","7.3.0","7.2.0","7.1.2","6.2.1","6.2.0","6.1.0","6.0.3","5.1.0","5.0.8","5.0.7","5.0.6","5.0.5","5.0.4","5.0.3","5.0.2","5.0.1","5.0.0","4.13.0","4.12.2","4.12.1","4.12.0","4.11.0","4.10.2","4.10.1","4.10.0","4.9.3","4.9.2","4.9.1","4.9.0","4.8.0","4.7.2","4.7.1","4.5.1","4.5.0","4.4.0","4.3.3","4.3.2","4.3.1","4.3.0","4.1.0","3.0.3","2.2.3","2.2.2","2.2.1","2.2.0","2.1.0","1.1.0-alpha","1.0.0-alpha"],"database_specific":{"vanir_signatures_modified":"2026-08-06T08:28:42Z","vanir_signatures":[{"source":"https://github.com/ihtsdo/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39","target":{"file":"src/main/java/org/snomed/snowstorm/rest/WebRouteController.java"},"deprecated":false,"digest":{"line_hashes":["312121057209247412561371746165427801910","123767059360933163767147935243888121600","245015302850170211236757456522837854582","265694949697940524124620988879311909521","194411002063778391076307791763018993394","241092865177827865429717117285236448938","173215006743254760077072466821569263509","105162729147787610127422201836441706337","285161036326361483053192775125343555417","156223145217900194020324385190719278086","132512299102570733574836108290291065542","220616026381048562317001045910114325221","121977656371723106385613621269169436800","295273920552171663191117767466069287522"],"threshold":0.9},"id":"CVE-2026-66300-2ad16563","signature_type":"Line","signature_version":"v1"},{"deprecated":false,"digest":{"function_hash":"66705611246460464664973953452139273591","length":617},"id":"CVE-2026-66300-4bbd4d38","signature_type":"Function","signature_version":"v1","source":"https://github.com/ihtsdo/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6","target":{"file":"src/main/java/org/snomed/snowstorm/rest/WebRouteController.java","function":"issueRedirect"}},{"source":"https://github.com/ihtsdo/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6","target":{"file":"src/main/java/org/snomed/snowstorm/rest/WebRouteController.java"},"deprecated":false,"digest":{"line_hashes":["312121057209247412561371746165427801910","123767059360933163767147935243888121600","245015302850170211236757456522837854582","265694949697940524124620988879311909521","194411002063778391076307791763018993394","241092865177827865429717117285236448938","173215006743254760077072466821569263509","105162729147787610127422201836441706337","285161036326361483053192775125343555417","156223145217900194020324385190719278086","132512299102570733574836108290291065542","220616026381048562317001045910114325221","121977656371723106385613621269169436800","295273920552171663191117767466069287522"],"threshold":0.9},"id":"CVE-2026-66300-83dd5f56","signature_type":"Line","signature_version":"v1"},{"signature_version":"v1","source":"https://github.com/ihtsdo/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39","target":{"function":"issueRedirect","file":"src/main/java/org/snomed/snowstorm/rest/WebRouteController.java"},"deprecated":false,"digest":{"function_hash":"66705611246460464664973953452139273591","length":617},"id":"CVE-2026-66300-adaee01a","signature_type":"Function"}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66300.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"}]}