{"id":"CVE-2026-72800","revision":null,"records":[{"revision":"f90e0f6fb8314b409af1a18317955a2e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72800","aliases":[],"title":"SiYuan before v3.7.4 Information Disclosure via Unfiltered API","description":"SiYuan versions before v3.7.4 fail to apply publish-access filtering to the getAttributeViewKeysByID endpoint, allowing authenticated readers to retrieve complete database column schemas including descriptions, select vocabularies, and template expressions. Additionally, getBlockDefIDsByRefText and getBlockRelevantIDs endpoints enumerate workspace-wide block IDs without publish scoping, enabling attackers to discover valid block identifiers across publish boundaries and access content from hidden or password-protected documents.","state":0,"publishedAt":"2026-08-12T19:07:46.303+00:00","modifiedAt":"2026-08-14T16:52:07.235+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-5fhr-f75j-8wr9","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-unfiltered-api"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72800","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72800","identifiers":["CVE-2026-72800"]},"retained":false,"historicalAffected":[]},{"revision":"316e85b52a2a40bc9885651fdf7db797","observedAt":"2026-10-25T15:19:03.401+00:00","statement":{"source":"nvd","id":"CVE-2026-72800","aliases":[],"title":"SiYuan versions before v3.7.4 fail to apply publish-access filtering to the getAttributeViewKeysByID endpoint, allowing authenticated readers to retrieve complete database column schemas including descriptions, select vocabularies, and temp…","description":"SiYuan versions before v3.7.4 fail to apply publish-access filtering to the getAttributeViewKeysByID endpoint, allowing authenticated readers to retrieve complete database column schemas including descriptions, select vocabularies, and template expressions. Additionally, getBlockDefIDsByRefText and getBlockRelevantIDs endpoints enumerate workspace-wide block IDs without publish scoping, enabling attackers to discover valid block identifiers across publish boundaries and access content from hidden or password-protected documents.","state":0,"publishedAt":"2026-08-12T20:17:51.83+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 · Primary","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-5fhr-f75j-8wr9","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-unfiltered-api"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72800","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-862"],"productCriteria":[],"sourceDates":{"published":"2026-08-12T20:17:51.830","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-2026-72800","identifiers":["CVE-2026-72800"]},"retained":false,"historicalAffected":[]},{"revision":"c64e35e63a8a4caa9b3e453dc08c83f0","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-5fhr-f75j-8wr9","aliases":["CVE-2026-72800","GO-2026-6395"],"title":"SiYuan: Missing publish-access filter on getAttributeViewKeysByID discloses database column schema, plus two unscoped block-ID enumeration oracles (publish mode)","description":"**CVE:** This vulnerability corresponds to [CVE-2026-72800](https://nvd.nist.gov/vuln/detail/CVE-2026-72800).\n\n### Summary\n\n`POST /api/av/getAttributeViewKeysByID` returns a database's full column schema with no publish-access filtering, while its sibling `getAttributeViewKeys` applies the filter for reader sessions. Two further endpoints, `getBlockDefIDsByRefText` and `getBlockRelevantIDs` return workspace-wide block IDs with no publish scoping. All three are `CheckAuth`-only, so they are reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`.\n\n### Details\n\n**(a) `getAttributeViewKeysByID`: ungated column-schema disclosure**\n\nThe entire handler (`kernel/api/av.go`, router line 548):\n```go\nret.Data = model.GetAttributeViewKeysByID(avID, keyIDs...)   // no publish gate\n```\n\nWith an empty `keyIDs`, `GetAttributeViewKeysByID` calls `av.ParseAttributeView(avID)` and returns every column's `*av.Key`:\n\n| Field | Discloses |\n|---|---|\n| `Name`, `Desc` | column title and user-authored description |\n| `Options` | the full single/multi-select vocabulary and colours (e.g. status labels such as \"Fired\", \"Confidential\") |\n| `Template` | the column's Sprig template expression — logic and field references |\n| `Relation` | the target `avID`, allowing pivot to another database |\n| `Rollup`, `NumberFormat`, date config | further schema |\n\n**Guarded-sibling asymmetry, same file:** `getAttributeViewKeys` (router line 526) runs `FilterBlockAttributeViewKeysByPublishAccess(...)` when `IsReadOnlyRoleContext`. `getAttributeViewKeysByID` applies nothing. A reader who knows an `avID` — trivially harvested from the `data-av-id` attribute of any published document embedding a database obtains the schema of any database in the workspace, including those whose host documents are hidden, password-protected, or publish-forbidden. `Relation` targets allow walking to sibling databases.\n\n**(b) Two unscoped block-ID enumeration oracles**\n\nBoth `CheckAuth`-only with no publish gate. Neither returns content of its own, but both yield valid block IDs that other endpoints turn into content:\n\n- `getBlockDefIDsByRefText` (router line 237) → `GetBlockDefIDsByRefText(anchor)` returns the block IDs, workspace-wide and including private documents, whose reference/anchor text equals a caller-supplied string: a ref-text → ID oracle.\n- `getBlockRelevantIDs` (router line 274) → `GetBlockRelevantIDsInBox(id, <notebook from request>)` returns parent/previous/next block IDs and traverses decrypted encrypted-notebook structure while the notebook is unlocked, a tree-walk oracle.\n\nVerified at `origin/master` (`eef105683`): all three handler bodies contain no publish-access, publish-ignore, or readonly-role check; all three routes are registered `CheckAuth` without `CheckAdminRole`.\n\n### Proof of Concept\n\nPrecondition: publish mode enabled (default port 6808); anonymous when `Publish.Auth.Enable` is `false`, otherwise any publish reader account. A database exists whose host document is publish-forbidden or password-protected.\n\n**(a) Column schema of any database:**\n```\nPOST http://127.0.0.1:6808/api/av/getAttributeViewKeysByID\n{\"avID\":\"<AV_ID>\"}\n```\nReturns every column's key object names, descriptions, select vocabularies, template expressions, and `Relation` target `avID`s for a database whose host document the reader may not access.\n\n**Control:** the sibling `getAttributeViewKeys` with the same `avID` returns filtered results for the same reader session, confirming the boundary is enforced there and omitted here.\n\n**(b) ID oracles:**\n```\nPOST http://127.0.0.1:6808/api/block/getBlockDefIDsByRefText\n{\"anchor\":\"<known ref text>\"}\n→ block IDs workspace-wide, including blocks in private documents\n\nPOST http://127.0.0.1:6808/api/block/getBlockRelevantIDs\n{\"id\":\"<BLOCK_ID>\",\"notebook\":\"<BOX_ID>\"}\n→ parent/previous/next block IDs; traverses encrypted-notebook structure when unlocked\n```\n\n### Impact\n\nAn anonymous reader (publish mode with auth disabled) or any publish `RoleReader` can read the complete column schema of any database in the workspace, including column descriptions, select-option vocabularies (which frequently encode sensitive category labels), template logic, and relation targets that permit pivoting to further databases regardless of whether the host document is hidden, password-protected, or excluded from publishing.\n\nThe two enumeration endpoints additionally supply valid block IDs across the publish boundary, including from encrypted notebooks while unlocked. This removes the \"attacker must already know a valid ID\" precondition from other block-read endpoints, converting ID knowledge into content disclosure. Confidentiality-only.\n\n### Note\n\ngetAttributeViewKeysByID is a distinct handler from getAttributeView; although column definitions also appear within the latter's response payload, a fix applied to one handler does not remediate the other, and getAttributeViewKeysByID has its own filtered sibling (getAttributeViewKeys) demonstrating the intended treatment.\n\n### Suggested fix\n\n- Gate `getAttributeViewKeysByID` with `FilterBlockAttributeViewKeysByPublishAccess`, mirroring `getAttributeViewKeys`.\n- Scope `getBlockDefIDsByRefText` and `getBlockRelevantIDs` to publish-accessible blocks for reader sessions, and ensure the `*InBox` traversal path applies the same check before walking encrypted-notebook structure.","state":0,"publishedAt":"2026-09-03T23:04:13+00:00","modifiedAt":"2026-09-10T15:25:49.8967541+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260724103335-f36331956ae9"}]}],"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-5fhr-f75j-8wr9","https://nvd.nist.gov/vuln/detail/CVE-2026-72800","https://github.com/siyuan-note/siyuan/commit/931ba693375ea9877b2ef74f9bfb632fad5bab3f","https://github.com/siyuan-note/siyuan/commit/f36331956ae98fc5358f8f93bf1da3427221edf3","https://github.com/siyuan-note/siyuan","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-unfiltered-api"],"sourceUrl":"https://github.com/advisories/GHSA-5fhr-f75j-8wr9","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-5fhr-f75j-8wr9","identifiers":["GHSA-5fhr-f75j-8wr9","CVE-2026-72800","GO-2026-6395"]},"retained":false,"historicalAffected":[]},{"revision":"454248196ae84755993598f4b059a657","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6395","aliases":["CVE-2026-72800","GHSA-5fhr-f75j-8wr9"],"title":"SiYuan: Missing publish-access filter on getAttributeViewKeysByID discloses database column schema, plus two unscoped block-ID enumeration oracles (publish mode) in github.com/siyuan-note/siyuan/kernel","description":"SiYuan: Missing publish-access filter on getAttributeViewKeysByID discloses database column schema, plus two unscoped block-ID enumeration oracles (publish mode) in github.com/siyuan-note/siyuan/kernel","state":0,"publishedAt":"2026-09-10T14:48:42+00:00","modifiedAt":"2026-09-10T15:15:14.7645275+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260724103335-f36331956ae9"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-5fhr-f75j-8wr9","https://nvd.nist.gov/vuln/detail/CVE-2026-72800","https://github.com/siyuan-note/siyuan/commit/931ba693375ea9877b2ef74f9bfb632fad5bab3f","https://github.com/siyuan-note/siyuan/commit/f36331956ae98fc5358f8f93bf1da3427221edf3","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-unfiltered-api"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6395","license":"OSV · upstream source license applies","key":"osv:GO-2026-6395","identifiers":["GO-2026-6395","CVE-2026-72800","GHSA-5fhr-f75j-8wr9"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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