{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-54759: SiYuan: Lute HTML sanitizer allows `<iframe>` tags in Bazaar package README, leading to arbitrary command execution via SiYuan Electron client","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-54759","status":"final","version":"1","initial_release_date":"2026-06-24T21:21:57.842Z","current_release_date":"2026-06-25T12:32:38.000Z","revision_history":[{"date":"2026-06-24T21:21:57.842Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, Lute's HTML sanitizer does not remove <iframe> elements. Combined with the SiYuan Electron client's permissive security configuration, an attacker can include a malicious <iframe> in a Bazaar package README that executes arbitrary commands on the victim's machine when the package details are viewed. No package installation is required. This vulnerability is fixed in 3.7.0.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-54759 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-54759"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-54759"},{"category":"external","summary":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-r6v5-4c66-f6pw","url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-r6v5-4c66-f6pw"}]},"product_tree":{"branches":[{"category":"vendor","name":"siyuan-note","branches":[{"category":"product_name","name":"siyuan","branches":[{"category":"product_version","name":"< 3.7.0","product":{"name":"siyuan-note siyuan < 3.7.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:siyuan-note:siyuan:\\<_3.7.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-54759","title":"SiYuan: Lute HTML sanitizer allows `<iframe>` tags in Bazaar package README, leading to arbitrary command execution via SiYuan Electron client","notes":[{"category":"description","text":"SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, Lute's HTML sanitizer does not remove <iframe> elements. Combined with the SiYuan Electron client's permissive security configuration, an attacker can include a malicious <iframe> in a Bazaar package README that executes arbitrary commands on the victim's machine when the package details are viewed. No package installation is required. This vulnerability is fixed in 3.7.0.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":8.7,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}