{"id":"CVE-2026-72796","revision":null,"records":[{"revision":"1aa2887f8e0d4d9c8f031f03f7ab67d6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72796","aliases":[],"title":"SiYuan before v3.7.4 Access Control Bypass via Static Routes","description":"SiYuan before v3.7.4 contains an access control bypass vulnerability where static-file routes in the server mux bypass publish-access controls enforced on the REST API. Attackers with publish reader tokens or anonymous access in disabled-auth mode can read templates, snippets, and export artifacts by directly accessing static routes that lack the same restrictions as their REST API counterparts.","state":0,"publishedAt":"2026-08-12T19:07:43.068+00:00","modifiedAt":"2026-08-14T16:52:04.498+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-fgmr-7w36-9qfq","https://www.vulncheck.com/advisories/siyuan-before-access-control-bypass-via-static-routes"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72796","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72796","identifiers":["CVE-2026-72796"]},"retained":false,"historicalAffected":[]},{"revision":"bb3e1c697903466784c2ee6f36a6a329","observedAt":"2026-10-25T15:19:03.401+00:00","statement":{"source":"nvd","id":"CVE-2026-72796","aliases":[],"title":"SiYuan before v3.7.4 contains an access control bypass vulnerability where static-file routes in the server mux bypass publish-access controls enforced on the REST API. Attackers with publish reader tokens or anonymous access in disabled-au…","description":"SiYuan before v3.7.4 contains an access control bypass vulnerability where static-file routes in the server mux bypass publish-access controls enforced on the REST API. Attackers with publish reader tokens or anonymous access in disabled-auth mode can read templates, snippets, and export artifacts by directly accessing static routes that lack the same restrictions as their REST API counterparts.","state":0,"publishedAt":"2026-08-12T20:17:51.267+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-fgmr-7w36-9qfq","https://www.vulncheck.com/advisories/siyuan-before-access-control-bypass-via-static-routes"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72796","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-862"],"productCriteria":[],"sourceDates":{"published":"2026-08-12T20:17:51.267","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-2026-72796","identifiers":["CVE-2026-72796"]},"retained":false,"historicalAffected":[]},{"revision":"d61ba67010444bdab2e56ff114defedf","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-fgmr-7w36-9qfq","aliases":["CVE-2026-72796","GO-2026-6423"],"title":"SiYuan: Static-file routes bypass the publish-access controls enforced on the REST API, exposing templates, snippets and export artifacts to anonymous readers","description":"**CVE:** This vulnerability corresponds to [CVE-2026-72796](https://nvd.nist.gov/vuln/detail/CVE-2026-72796).\n\n### Summary\n\nSeveral static-file routes in the server mux (`kernel/server/serve.go`) are registered with `CheckAuth` only and serve directories directly, without the publish-access checks, sensitive-path blocklist, or `refuseToAccess` rules that the REST API applies to the same data. They are therefore reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`.\n\nMost notably, `/templates/` serves `data/templates` a directory the REST file API explicitly refuses to serve to non-administrators.\n\n### Details\n\n| Route | Registration | Guard | Exposed to a reader |\n|---|---|---|---|\n| `/templates/*` (line 424) | `Group(\"/templates/\", model.CheckAuth).Static(\"\", data/templates)` | none beyond path cleaning | the templates directory |\n| `/snippets/*` (line 434) | `CheckAuth` | blocks only `conf.json` | any snippet's JS/CSS content by name |\n| `/widgets/`, `/plugins/`, `/emojis/` (409/414/419) | `Group(CheckAuth).Static(dir)` | none | whole directory trees |\n| `/export/*` (line 320) | `Group(\"/export/\", CheckAuth)` | traversal, sensitive-path and DEK guards: **no publish check** | export artifacts (PDF/HTML/DOCX/CSV) |\n\n**`/templates/` directly contradicts an existing control.** The REST file path runs `refuseToAccess` (`kernel/api/file.go:551-553`), which explicitly returns 403 for `data/templates/` to non-administrators the project has already decided readers must not read templates. The `/templates/` static route serves that same directory to any `RoleReader`, with no `IsSensitivePath` check, no publish-access check, and no `refuseToAccess`. Templates are user-authored Markdown documents containing template/Sprig syntax and are not covered by publish-access controls. `gin`'s `.Static` disables directory listing, so a filename is required but the contradiction with `refuseToAccess` is the defect.\n\n**`/export/` versus `/assets/`.** `/assets/*path` (line 692) correctly gates non-administrators via `CheckAbsPathAccessableByPublishAccess`, plus `IsSensitivePath` and encrypted-asset handling. `/export/` carries traversal, sensitive-path and DEK guards but no publish-access check, so a reader can retrieve export artifacts of arbitrary documents, including private ones. Artifact naming is mixed, some use a random export ID, but code and CSV exports use the document name (`export/code/<name>`, `export/csv/<name>/<name>.csv`), which a reader can derive from `listDocsByPath` titles while the artifact exists. This path is therefore conditional.\n\n**Confirmed correctly gated, for contrast:** `/assets/*` (publish-gated), `/history/*` and `/repo/diff/*` (`CheckAdminRole`), `/debug/pprof/*` (disabled in production builds), `/public/` (intentionally public).\n\nAll four routes above were verified to carry `CheckAuth` only, no `CheckReadonly`, no `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.\n\n**Templates: served despite the REST API refusing them:**\n```\nGET http://127.0.0.1:6808/templates/<template-file>.md\n→ 200, template content\n```\nThe equivalent REST request is refused:\n```\nPOST http://127.0.0.1:6808/api/file/getFile\n{\"path\":\"data/templates/<template-file>.md\"}\n→ 403 (refuseToAccess)\n```\nThe same reader session obtains the file through the static route.\n\n**Snippets:**\n```\nGET http://127.0.0.1:6808/snippets/<snippet-name>.js\n→ 200, snippet source\n```\n\n**Export artifacts (conditional on a predictable name while the artifact exists):**\n```\nGET http://127.0.0.1:6808/export/csv/<doc-name>/<doc-name>.csv\n→ 200, exported content of a document the reader has no publish access to\n```\n\n### Impact\n\nAn anonymous reader (publish mode with auth disabled) or any publish `RoleReader` can read user-authored template documents that the REST API explicitly withholds from non-administrators, snippet source (JS/CSS), and the contents of the widgets, plugins and emoji directories. Where an export artifact exists under a derivable name, they can additionally retrieve exported content of documents outside their publish scope. Confidentiality-only.\n\n### Suggested fix\n\nApply the same treatment these routes' REST counterparts already receive: for non-administrator roles, enforce publish-access scoping plus `IsSensitivePath` and the `refuseToAccess` blocklist on the static routes, mirroring `/assets/*`. Alternatively, block `/templates/`, non-public `/snippets/`, and `/export/` for reader roles entirely.","state":0,"publishedAt":"2026-09-04T21:02:22+00:00","modifiedAt":"2026-09-10T15:25:50.6701461+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260725122641-34be6c0bb073"}]}],"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-fgmr-7w36-9qfq","https://nvd.nist.gov/vuln/detail/CVE-2026-72796","https://github.com/siyuan-note/siyuan/commit/34be6c0bb0739d5b8e99ecc0cbfb474abb16230d","https://github.com/siyuan-note/siyuan","https://www.vulncheck.com/advisories/siyuan-before-access-control-bypass-via-static-routes"],"sourceUrl":"https://github.com/advisories/GHSA-fgmr-7w36-9qfq","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-fgmr-7w36-9qfq","identifiers":["GHSA-fgmr-7w36-9qfq","CVE-2026-72796","GO-2026-6423"]},"retained":false,"historicalAffected":[]},{"revision":"e1aed5eb30054348b4ed98208ecfe74d","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6423","aliases":["CVE-2026-72796","GHSA-fgmr-7w36-9qfq"],"title":"SiYuan: Static-file routes bypass the publish-access controls enforced on the REST API, exposing templates, snippets and export artifacts to anonymous readers in github.com/siyuan-note/siyuan/kernel","description":"SiYuan: Static-file routes bypass the publish-access controls enforced on the REST API, exposing templates, snippets and export artifacts to anonymous readers in github.com/siyuan-note/siyuan/kernel","state":0,"publishedAt":"2026-09-10T14:48:42+00:00","modifiedAt":"2026-09-10T15:15:15.6153584+00:00","affected":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260725122641-34be6c0bb073"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-fgmr-7w36-9qfq","https://nvd.nist.gov/vuln/detail/CVE-2026-72796","https://github.com/siyuan-note/siyuan/commit/34be6c0bb0739d5b8e99ecc0cbfb474abb16230d","https://www.vulncheck.com/advisories/siyuan-before-access-control-bypass-via-static-routes"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6423","license":"OSV · upstream source license applies","key":"osv:GO-2026-6423","identifiers":["GO-2026-6423","CVE-2026-72796","GHSA-fgmr-7w36-9qfq"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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