{"id":"EUVD-2026-59803","enisaUuid":"598ed884-f04f-3411-b2d2-5849c176651c","description":"SiYuan versions before v3.7.4 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated query parameters to bypass access auth code validation and receive the live kernel event stream including document identifiers, titles, and operation logs.","datePublished":"Aug 15, 2026, 9:44:53 PM","dateUpdated":"Aug 17, 2026, 5:25:30 PM","baseScore":8.7,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","references":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83\nhttps://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-websocket\n","aliases":"CVE-2026-73054\nGHSA-hg5w-8ppq-wpjq\nGHSA-c8w8-3pqp-wr83\n","assigner":"VulnCheck","epss":0.54,"enisaIdProduct":[{"id":"a301f90e-e223-38bd-86d9-a71781056057","product":{"name":"SiYuan","vendor":{"name":"siyuan-note"}},"product_version":"0 \u003c3.7.4"}],"enisaIdVendor":[{"id":"5d9e670d-ff37-38f0-ba1f-91242f542633","vendor":{"name":"siyuan-note"}}],"enisaIdVulnerability":[{"id":"a275b792-9417-314a-968f-f88b6647f319","vulnerability":{"id":"CVE-2026-73054","description":"SiYuan versions before v3.7.4 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated query parameters to bypass access auth code validation and receive the live kernel event stream including document identifiers, titles, and operation logs.","datePublished":"Aug 15, 2026, 9:44:53 PM","dateUpdated":"Aug 17, 2026, 5:25:30 PM","status":"PUBLISHED","baseScore":8.7,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","references":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83\nhttps://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-websocket\n","enisa_id":"EUVD-2026-59803\n","assigner":"VulnCheck","epss":0.54,"dataProcessed":"Oct 28, 2026, 7:14:10 AM","vulnerabilityProduct":[{"id":"c916fed7-7c63-357a-805d-59ca4d303fa5","product":{"name":"SiYuan","vendor":{"name":"siyuan-note"}},"product_version":"0 \u003c3.7.4"}],"vulnerabilityVendor":[{"id":"4c8c8f25-5a1b-34a7-abc1-9ba524973e9c","vendor":{"name":"siyuan-note"}}]}},{"id":"eeaac7ae-c333-3c8c-91f5-781f310f5cec","vulnerability":{"id":"GHSA-c8w8-3pqp-wr83","description":"SiYuan: A parser differential between the WebSocket keepalive exemption and the session quarantine allows unauthenticated access to the broadcast event stream","datePublished":"Oct 23, 2026, 6:34:09 PM","dateUpdated":"Oct 23, 2026, 6:34:09 PM","baseScore":0.0,"references":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-73054\nhttps://github.com/siyuan-note/siyuan/commit/67bc300b6ea6650d99dae55c827aeced419c8ac4\nhttps://github.com/siyuan-note/siyuan\nhttps://github.com/siyuan-note/siyuan/releases/tag/v3.7.4-alpha.4\nhttps://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-websocket\n","enisa_id":"EUVD-2026-59803\n","aliases":"GHSA-c8w8-3pqp-wr83\nCVE-2026-73054\n","epss":0.0,"dataProcessed":"Oct 28, 2026, 7:03:20 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"efb604af-4b27-3d70-b4a4-bdbaa2c2193d","vulnerability":{"id":"GHSA-hg5w-8ppq-wpjq","description":"Duplicate Advisory: SiYuan: A parser differential between the WebSocket keepalive exemption and the session quarantine allows unauthenticated access to the broadcast event stream, defeating the fix for GHSA-xp2m-98x8-rpj6","datePublished":"Aug 16, 2026, 12:31:28 AM","dateUpdated":"Oct 23, 2026, 6:33:33 PM","baseScore":0.0,"references":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-73054\nhttps://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-websocket\n","enisa_id":"EUVD-2026-59803\n","aliases":"GHSA-hg5w-8ppq-wpjq\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 11:00:32 PM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}