{"id":"CVE-2026-23645","aliases":["GHSA-pcjq-j3mq-jv5j","GO-2026-4324"],"url":"https://o3.security/vulnerability/CVE-2026-23645","summary":"SiYuan Vulnerable to Stored Cross-Site Scripting (XSS) via Unrestricted SVG File Upload","details":"SiYuan is self-hosted, open source personal knowledge management software. Prior to 3.5.4-dev2, a Stored Cross-Site Scripting (XSS) vulnerability exists in SiYuan Note. The application does not sanitize uploaded SVG files. If a user uploads and views a malicious SVG file (e.g., imported from an untrusted source), arbitrary JavaScript code is executed in the context of their authenticated session. This vulnerability is fixed in 3.5.4-dev2.","published":"2026-01-16T19:20:06.744Z","modified":"2026-08-12T03:51:12.978373315Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","fixedVersion":"0.0.0-20260116101155-11115da3d0de"}],"fix":{"url":"https://github.com/siyuan-note/siyuan/commit/11115da3d0de950593ee4ce375cf7f9018484388","label":"siyuan-note/siyuan@11115da"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23645.json"},{"type":"ADVISORY","url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pcjq-j3mq-jv5j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23645"},{"type":"REPORT","url":"https://github.com/siyuan-note/siyuan/issues/16844"},{"type":"FIX","url":"https://github.com/siyuan-note/siyuan/commit/11115da3d0de950593ee4ce375cf7f9018484388"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:12.978373315Z"}}