{"id":"CVE-2026-73609","kind":"vulnerability","aliases":["CVE-2026-73609","GHSA-j4ph-9xwf-wcj4","GO-2026-6634"],"related":[],"title":"SiYuan: getBookmarkLabels returns every bookmark label in the workspace to anonymous readers, with no publish-access filtering in github.com/siyuan-note/siyuan/kernel","description":"SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the getBookmarkLabels endpoint that returns all bookmark labels in the workspace without publish-access filtering. Anonymous readers and publish-mode readers can obtain the complete bookmark vocabulary across the workspace, disclosing subject matter and organizational information from inaccessible documents.","summary":"SiYuan's getBookmarkLabels endpoint returns every bookmark label in the workspace, ignoring publish-access limits. An anonymous or publish-mode reader can read the full bookmark vocabulary, which reveals topics and organizational details from documents they cannot open.","severity":"medium","cvss":6.9,"epss":0.00325,"exploited":false,"exploited_at":null,"products":[{"name":"github.com/siyuan-note/siyuan/kernel","fixed":["0.0.0-20260812083335-251596fc0de2"],"affected":"< 0.0.0-20260812083335-251596fc0de2","ecosystem":"go"}],"ecosystems":["go"],"tags":["go","package","self-hosted","siyuan"],"not_affected_if":["managed-hosting","publish-mode-disabled","version-3.7.4-or-later"],"how_to_check":null,"fix":"Upgrade the github.com/siyuan-note/siyuan/kernel module to 0.0.0-20260812083335-251596fc0de2 or later (SiYuan v3.7.4 or later per the advisory).","status":"open","published_at":"2026-08-13T12:17:25+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","triaged_at":"2026-10-23T21:45:58+00:00","updated_at":"2026-10-23T21:45:58+00:00","category":"package","confidence":0.75,"triage":{"at":"2026-10-23T21:45:58Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade the github.com/siyuan-note/siyuan/kernel module to 0.0.0-20260812083335-251596fc0de2 or later (SiYuan v3.7.4 or later per the advisory).\nunknown","reach":"network","impact":"low","summary":"SiYuan's getBookmarkLabels endpoint returns every bookmark label in the workspace, ignoring publish-access limits. An anonymous or publish-mode reader can read the full bookmark vocabulary, which reveals topics and organizational details from documents they cannot open.","category":"package","who_cares":["siyuan","self-hosted","go"],"confidence":0.75,"needs_auth":"no","worst_case":"Anonymous readers learn bookmark labels from private workspace documents.","analyst_note":"","how_to_check":"unknown","needs_analyst":false,"not_affected_if":["managed-hosting","publish-mode-disabled","version-3.7.4-or-later"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000485,"input_tokens":3009,"output_tokens":369,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':24A,32A,35A '-6634':33A '-73609':25A,36A '/siyuan-note/siyuan/kernel':22A,39A '9xwf':29A 'access':17A,60B,110C 'across':125C 'anonym':11A,63B,112C 'bookmark':5A,52B,73B,102C,123C 'cannot':84B 'complet':122C 'contain':90C 'cve':23A,34A 'detail':80B 'disclos':128C 'disclosur':93C 'document':82B,136C 'endpoint':49B,98C 'everi':4A,51B 'filter':18A,111C 'full':72B 'getbookmarklabel':2A,48B,97C 'ghsa':27A 'ghsa-j4ph-9xwf-wcj4':26A 'github.com':21A,38A 'github.com/siyuan-note/siyuan/kernel':20A,37A 'go':31A,40B 'host':44B 'ignor':57B 'inaccess':135C 'inform':92C,133C 'j4ph':28A 'label':6A,53B,103C 'limit':61B 'matter':130C 'mode':67B,117C 'obtain':120C 'open':85B 'organiz':79B,132C 'packag':41B 'publish':16A,59B,66B,109C,116C 'publish-access':15A,58B,108C 'publish-mod':65B,115C 'read':70B 'reader':12A,68B,113C,118C 'return':3A,50B,100C 'reveal':76B 'self':43B 'self-host':42B 'siyuan':1A,45B,46B,86C 'subject':129C 'topic':77B 'v3.7.4':89C 'version':87C 'vocabulari':74B,124C 'vulner':94C 'wcj4':30A 'without':107C 'workspac':9A,56B,106C,127C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-08-13T12:17:25+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"govuln","external_id":"GO-2026-6634","url":"https://pkg.go.dev/vuln/GO-2026-6634","severity":null,"published_at":"2026-10-07T14:09:59+00:00","modified_at":"2026-10-07T14:09:59+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","fetched_at":"2026-10-23T19:13:08+00:00","note":null},{"source":"epss","external_id":"CVE-2026-73609","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-73609","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:43+00:00","fetched_at":"2026-10-23T19:13:43+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-73609","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73609","severity":null,"published_at":"2026-08-13T12:17:25+00:00","modified_at":"2026-10-23T18:10:00+00:00","first_seen_at":"2026-10-23T19:35:23+00:00","fetched_at":"2026-10-23T19:35:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}