{"id":"CVE-2026-72803","revision":null,"records":[{"revision":"11bb88ea5e6b4555ac38d36f482e233e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72803","aliases":[],"title":"SiYuan before v3.7.4 Information Disclosure via getBlockAttrs","description":"SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.","state":0,"publishedAt":"2026-08-12T19:07:48.459+00:00","modifiedAt":"2026-08-14T16:52:09.591+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-qvq9-hq6p-v378","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getblockattrs"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72803","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72803","identifiers":["CVE-2026-72803"]},"retained":false,"historicalAffected":[]},{"revision":"00326708ca9249fdb1b6a493196b5150","observedAt":"2026-10-25T15:19:03.401+00:00","statement":{"source":"nvd","id":"CVE-2026-72803","aliases":[],"title":"SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents b…","description":"SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.","state":0,"publishedAt":"2026-08-12T20:17:52.247+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-qvq9-hq6p-v378","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getblockattrs"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72803","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-862"],"productCriteria":[],"sourceDates":{"published":"2026-08-12T20:17:52.247","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-2026-72803","identifiers":["CVE-2026-72803"]},"retained":false,"historicalAffected":[]},{"revision":"f3bf4b4463fa426386c1a9319863de39","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-qvq9-hq6p-v378","aliases":["CVE-2026-72803","GO-2026-6404"],"title":"SiYuan: Missing publish-access filter on getBlockAttrs and batchGetBlockAttrs discloses block attributes (name, alias, memo, custom fields) of protected documents","description":"**CVE:** This vulnerability corresponds to [CVE-2026-72803](https://nvd.nist.gov/vuln/detail/CVE-2026-72803).\n\n### Summary\n\n`POST /api/attr/getBlockAttrs` and `POST /api/attr/batchGetBlockAttrs` return a block's full attribute set (IAL) with no publish-access check. Both are `CheckAuth`-only, so they are reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`. An anonymous reader supplying a block ID receives the block's name, alias, memo, bookmark, tags, and every `custom-*` attribute including for blocks in publish-forbidden and password-protected documents. The batch variant accepts an ID list, making it a bulk extraction primitive.\n\n### Details\n\nNeither handler applies a filter:\n\n```go\n// /api/attr/getBlockAttrs      (router line 301)\nret.Data = sql.GetBlockAttrs(id)\n\n// /api/attr/batchGetBlockAttrs (router line 302)\nret.Data = sql.BatchGetBlockAttrs(idList)\n```\n\n`sql.GetBlockAttrs` is a direct database read returning the block's entire IAL: `name`, `alias`, `memo`, `bookmark`, `tags`, and any `custom-*` key/value the user has set. Several of these are user-authored free text memos in particular are freeform notes attached to a block so this is document content, not merely structural metadata.\n\n`batchGetBlockAttrs` takes an arbitrary list of block IDs in a single request, so an attacker holding a set of block IDs can sweep attributes across the entire workspace in one call.\n\n**Guarded-sibling asymmetry.** The sibling metadata endpoint `getBlockInfo` calls `checkBlockPublishAccess(c, id, ret)` before returning; `getBlockAttrs` and `batchGetBlockAttrs` call nothing.\n\nVerified at `origin/master`: both handler bodies contain no publish-access, publish-ignore, or readonly-role check, and both 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 document is marked publish-forbidden (or password-protected) and contains a block with a memo and a custom attribute set.\n\n**Single-block disclosure:**\n```\nPOST http://127.0.0.1:6808/api/attr/getBlockAttrs\n{\"id\":\"<BLOCK_ID_IN_PROTECTED_DOC>\"}\n```\nReturns the block's IAL: `name`, `alias`, `memo`, `bookmark`, `tags`, and all `custom-*` values.\n\n**Bulk disclosure:**\n```\nPOST http://127.0.0.1:6808/api/attr/batchGetBlockAttrs\n{\"ids\":[\"<ID1>\",\"<ID2>\",\"<ID3>\"]}\n```\nReturns the attribute sets for every supplied ID in one response, with no per-ID authorization.\n\n**Control:** the sibling `getBlockInfo` with the same block ID is refused by `checkBlockPublishAccess`, confirming the boundary is enforced elsewhere and omitted here.\n\n### Impact\n\nAn anonymous reader (publish mode with auth disabled) or any publish `RoleReader` can read block attributes belonging to publish-forbidden and password-protected documents, including user-authored memos and arbitrary `custom-*` values. The batch endpoint turns this into a bulk primitive: given a set of block IDs, an attacker retrieves attributes across the whole workspace in a single request. Confidentiality-only.\n\n### Suggested fix\n\nCall `checkBlockPublishAccess` in `getBlockAttrs` before returning, matching `getBlockInfo`. For `batchGetBlockAttrs`, apply the check per ID and drop unauthorized entries from the response rather than failing the whole batch.","state":0,"publishedAt":"2026-09-03T22:58:29+00:00","modifiedAt":"2026-09-10T15:25:29.8612188+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260724093256-229fdffd7e4a"}]}],"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-qvq9-hq6p-v378","https://nvd.nist.gov/vuln/detail/CVE-2026-72803","https://github.com/siyuan-note/siyuan/commit/229fdffd7e4afdef543d4d8495657fda8a369400","https://github.com/siyuan-note/siyuan","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getblockattrs"],"sourceUrl":"https://github.com/advisories/GHSA-qvq9-hq6p-v378","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-qvq9-hq6p-v378","identifiers":["GHSA-qvq9-hq6p-v378","CVE-2026-72803","GO-2026-6404"]},"retained":false,"historicalAffected":[]},{"revision":"f905f43018364e3d80f6285bc0ae87fe","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6404","aliases":["CVE-2026-72803","GHSA-qvq9-hq6p-v378"],"title":"SiYuan: Missing publish-access filter on getBlockAttrs and batchGetBlockAttrs discloses block attributes (name, alias, memo, custom fields) of protected documents in github.com/siyuan-note/siyuan/kernel","description":"SiYuan: Missing publish-access filter on getBlockAttrs and batchGetBlockAttrs discloses block attributes (name, alias, memo, custom fields) of protected documents in github.com/siyuan-note/siyuan/kernel","state":0,"publishedAt":"2026-09-10T14:48:42+00:00","modifiedAt":"2026-09-10T15:15:14.404474+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260724093256-229fdffd7e4a"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-qvq9-hq6p-v378","https://nvd.nist.gov/vuln/detail/CVE-2026-72803","https://github.com/siyuan-note/siyuan/commit/229fdffd7e4afdef543d4d8495657fda8a369400","https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getblockattrs"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6404","license":"OSV · upstream source license applies","key":"osv:GO-2026-6404","identifiers":["GO-2026-6404","CVE-2026-72803","GHSA-qvq9-hq6p-v378"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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