{"apiVersion":"1.0","identifier":"CVE-2026-74902","description":"SiYuan before v3.7.4 contains a cross-site scripting vulnerability in the file upload validation flow that fails to escape filenames before inserting them into HTML via insertAdjacentHTML. Attackers can craft a malicious filename containing script payloads that execute with full OS command access when a user drags, drops, or pastes the file into the editor.","publishedAt":"2026-08-18T12:19:30","lastModifiedAt":"2026-08-26T17:04:11","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74902","cvssScore":8.6,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","epssProbability":0.00147,"riskScore":0.87,"affectedProduct":"SiYuan","affectedVersions":"<3.7.4","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74902","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74902","en":"https://www.redsauce.net/en/cves/CVE-2026-74902","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74902","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74902","de":"https://www.redsauce.net/de/cves/CVE-2026-74902","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74902","el":"https://www.redsauce.net/el/cves/CVE-2026-74902"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74902"}}