{"id":"CVE-2026-73606","revision":null,"records":[{"revision":"4de8196c977048c3a0cb7d844aeee63a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73606","aliases":[],"title":"SiYuan before v3.7.4 Information Disclosure via getRefIDs","description":"SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/block/getRefIDs endpoint that fails to check password-protected document tiers. Unauthenticated readers can discover that password-protected documents reference specific blocks and obtain block identifiers without entering the document password.","state":0,"publishedAt":"2026-08-13T11:28:11.481+00:00","modifiedAt":"2026-08-14T16:52:32.09+00:00","affected":[{"ecosystem":"Vendor product","name":"siyuan","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"siyuan-note\",\n                    \"product\": \"siyuan\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/github.com/siyuan-note/siyuan/kernel\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.7.4\"\n                        },\n                        {\n                            \"version\": \"3.7.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","score":5.8,"severity":"MEDIUM"}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vg99-7gj7-2fr5","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getrefids"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73606","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73606","identifiers":["CVE-2026-73606"]},"retained":false,"historicalAffected":[]},{"revision":"f0cfc2d477ef43f9be700d7e0e134eb9","observedAt":"2026-10-25T15:19:09.409+00:00","statement":{"source":"nvd","id":"CVE-2026-73606","aliases":[],"title":"SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/block/getRefIDs endpoint that fails to check password-protected document tiers. Unauthenticated readers can discover that password-protected documents…","description":"SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/block/getRefIDs endpoint that fails to check password-protected document tiers. Unauthenticated readers can discover that password-protected documents reference specific blocks and obtain block identifiers without entering the document password.","state":0,"publishedAt":"2026-08-13T12:17:25.043+00:00","modifiedAt":"2026-10-24T15:10:00.19+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","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","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","score":5.8,"severity":"MEDIUM"}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vg99-7gj7-2fr5","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getrefids"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73606","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-639"],"productCriteria":[],"sourceDates":{"published":"2026-08-13T12:17:25.043","lastModified":"2026-10-24T15:10:00.190"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-73606","identifiers":["CVE-2026-73606"]},"retained":false,"historicalAffected":[]},{"revision":"973e99409efc4b5b9ca79e4e8d388d17","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-vg99-7gj7-2fr5","aliases":["CVE-2026-73606","GO-2026-6635"],"title":"SiYuan: The reference filter for getRefIDs checks visibility but not the password tier, disclosing that password-protected documents reference a given block","description":"### Summary\n\n`/api/block/getRefIDs` filters its results for reader roles through a helper that checks only the visibility tiers. The password tier is not checked, because the helper does not receive the request context and therefore cannot evaluate the publish auth cookie. A reader who has not entered a document's publish password learns that the document references a given block.\n\nA function ten lines away in the same file does perform the full check, on the same input type.\n\n### Details\n\n**Route,** identical at `eef105683` (`kernel/api/router.go:235`) and dev `a7ae96ce` (`:245`):\n\n```go\nginServer.Handle(\"POST\", \"/api/block/getRefIDs\", model.CheckAuth, getRefIDs)\n```\n\nNo `CheckReadonly`, no `CheckAdminRole`.\n\n**The filter chain.** `getRefIDs` (`kernel/api/block.go:631`) checks `isEncryptedNotebookDeniedForPublish`, calls `model.GetBlockRefsInBox`, then for read-only roles:\n\n```go\npublishIgnore := model.GetInvisiblePublishAccess(publishAccess)\nrefDefs, originalRefBlockIDs = model.FilterRefDefsByPublishIgnore(publishIgnore, refDefs)\n```\n\n`FilterRefDefsByPublishIgnore` (`kernel/model/publish_access.go:1324`) collects the reference and definition identifiers, resolves their block trees, and delegates the decision to `FilterBlockTreesByPublishIgnore` (`:1314`), whose entire body is:\n\n```go\nfor id, bt := range bts {\n    if CheckPathAccessableByPublishIgnore(bt.BoxID, bt.Path, publishIgnore) {\n        ret[id] = bt\n    }\n}\n```\n\nInside that helper, `CheckPublishAuthCookie`, `GetPathPasswordByPublishAccess`, `checkBlockTreeAccessableByPublishAccess` and `password` all appear zero times.\n\n**The complete check exists in the same file.** `kernel/model/publish_access.go:431`:\n\n```go\nfunc checkBlockTreeAccessableByPublishAccess(c *gin.Context, publishAccess PublishAccess, bt *treenode.BlockTree) bool {\n    if bt == nil || IsEncryptedBoxDeniedByPublishAccess(bt.BoxID) {\n        return false\n    }\n    publishIgnore := filterDisablePublishAccess(publishAccess)\n    passwordID, password := GetPathPasswordByPublishAccess(bt.BoxID, bt.Path, publishAccess)\n    return CheckPathAccessableByPublishIgnore(bt.BoxID, bt.Path, publishIgnore) &&\n           (password == \"\" || CheckPublishAuthCookie(c, passwordID, password))\n}\n```\n\nSame package, same file, same `*treenode.BlockTree` input. One takes the context and evaluates the password; the other does not receive it and structurally cannot.\n\n**Route-level contrast.** The adjacent `getChildBlocks` and `getTailChildBlocks` both carry `model.CheckAdminRole`.\n\n**Note on a prior assessment.** `getRefIDs` has been described as correctly filtered because it calls a publish-access filter. It does. The filter it calls covers the visibility tiers only.\n\n### Proof of Concept\n\nKernel 3.7.2, publish mode on port 6808, `Publish.Auth.Enable` false, anonymous client. A public document referenced from a second document whose publish tier was changed between runs. `getRefIDs` was called anonymously each time.\n\n| Tier of the referring document | Anonymous result |\n|---|---|\n| Public | reference returned (baseline) |\n| Password-protected | **reference still returned** |\n| Hidden | `[]`, filtered |\n| Forbidden | `[]`, filtered |\n\nThe hidden and forbidden rows confirm the filter runs and works. The password-protected row is the defect.\n\n### Impact\n\nAn anonymous reader in publish mode, or any publish `RoleReader`, learns that a password-protected document contains a reference to a given block, without entering that document's password, and receives the block identifiers involved.\n\nScoped precisely: the response carries identifiers only. `type RefDefs { RefID string; DefIDs []string }`, returned alongside `originalRefBlockIDs`, a map of identifier to identifier. There is no reference text, title or content. The disclosure is the existence of a relationship, plus identifiers usable as input to other endpoints.\n\nConfidentiality only.\n\n### Suggested fix\n\nThread `*gin.Context` into `FilterRefDefsByPublishIgnore` and `FilterBlockTreesByPublishIgnore`, and use `checkBlockTreeAccessableByPublishAccess` in place of the bare `CheckPathAccessableByPublishIgnore` call, so the password tier and the encrypted-box check are both applied.","state":0,"publishedAt":"2026-10-01T16:29:35+00:00","modifiedAt":"2026-10-07T17:55:43.0264771+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260812083335-251596fc0de2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vg99-7gj7-2fr5","https://nvd.nist.gov/vuln/detail/CVE-2026-73606","https://github.com/siyuan-note/siyuan","https://github.com/siyuan-note/siyuan/releases/tag/v3.8.0","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getrefids"],"sourceUrl":"https://github.com/advisories/GHSA-vg99-7gj7-2fr5","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-vg99-7gj7-2fr5","identifiers":["GHSA-vg99-7gj7-2fr5","CVE-2026-73606","GO-2026-6635"]},"retained":false,"historicalAffected":[]},{"revision":"633d083eefbd4eeb932c6e0e390fc74c","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6635","aliases":["CVE-2026-73606","GHSA-vg99-7gj7-2fr5"],"title":"SiYuan: The reference filter for getRefIDs checks visibility but not the password tier, disclosing that password-protected documents reference a given block in github.com/siyuan-note/siyuan/kernel","description":"SiYuan: The reference filter for getRefIDs checks visibility but not the password tier, disclosing that password-protected documents reference a given block in github.com/siyuan-note/siyuan/kernel","state":0,"publishedAt":"2026-10-07T14:09:59+00:00","modifiedAt":"2026-10-07T17:45:14.4766027+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260812083335-251596fc0de2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vg99-7gj7-2fr5","https://nvd.nist.gov/vuln/detail/CVE-2026-73606","https://github.com/siyuan-note/siyuan/releases/tag/v3.8.0","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getrefids"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6635","license":"OSV · upstream source license applies","key":"osv:GO-2026-6635","identifiers":["GO-2026-6635","CVE-2026-73606","GHSA-vg99-7gj7-2fr5"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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