{"id":"CVE-2026-82654","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-82654","summary":"SiYuan before v3.8.1 fails to properly escape block name, alias, and memo fields in hint, backlink, and breadcrumb rendering functions. Attackers can set a block's name to contain HTML/script…","details":"SiYuan before v3.8.1 fails to properly escape block name, alias, and memo fields in hint, backlink, and breadcrumb rendering functions. Attackers can set a block's name to contain HTML/script tags that execute when another user views documents referencing or displaying that block.","published":"2026-08-30T15:16:46.173","modified":"2026-08-30T15:16:46.173","cvss":{"score":8.9,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hf87-qh3j-3p88"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-block-name"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-30T15:16:46.173"}}