{"apiVersion":"1.0","identifier":"CVE-2026-75916","description":"SiYuan through 3.7.3 contains a cross-site scripting vulnerability in the -((- block-reference autocomplete hint popup. In genHintItemHTML() (app/src/protyle/hint/extend.ts), a candidate block-s name, alias, and memo fields are concatenated into the popup-s HTML without escaping. An attacker who can set these metadata fields on a block can inject a self-firing payload (e.g. <img src=x onerror=...>) that executes automatically when a victim types -((- followed by a search term that surfaces the crafted block. Because SiYuan-s Electron windows run with nodeIntegration enabled, contextIsolation disabled, and no CSP, the injected script gains require(-child_process-) access, allowing the XSS to escalate to arbitrary OS command execution.","publishedAt":"2026-08-19T14:17:41","lastModifiedAt":"2026-08-26T17:07:30","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75916","cvssScore":8.6,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","epssProbability":0.00159,"riskScore":0.87,"affectedProduct":"SiYuan","affectedVersions":"<=3.7.3","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-75916","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-75916","en":"https://www.redsauce.net/en/cves/CVE-2026-75916","fr":"https://www.redsauce.net/fr/cves/CVE-2026-75916","pt":"https://www.redsauce.net/pt/cves/CVE-2026-75916","de":"https://www.redsauce.net/de/cves/CVE-2026-75916","sk":"https://www.redsauce.net/sk/cves/CVE-2026-75916","el":"https://www.redsauce.net/el/cves/CVE-2026-75916"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-75916"}}