{"api_version":"1","generated_at":"2026-04-17T05:48:45+00:00","cve":"CVE-2026-40259","urls":{"html":"https://cve.report/CVE-2026-40259","api":"https://cve.report/api/cve/CVE-2026-40259.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-40259","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-40259"},"summary":{"title":"SiYuan: Publish Reader Can Arbitrarily Delete Attribute View Files via removeUnusedAttributeView API","description":"SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, the /api/av/removeUnusedAttributeView endpoint is protected only by generic authentication that accepts publish-service RoleReader tokens. The handler passes a caller-controlled id directly to a model function that unconditionally deletes the corresponding attribute view file from the workspace without verifying that the caller has write privileges or that the target attribute view is actually unused. An authenticated publish-service reader can permanently delete arbitrary attribute view definitions by extracting publicly exposed data-av-id values from published content, causing breakage of database views and workspace rendering until manually restored. This issue has been fixed in version 3.6.4.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-04-16 23:16:33","updated_at":"2026-04-16 23:16:33"},"problem_types":["CWE-285","CWE-285 CWE-285: Improper Authorization"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4","name":"https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7m5h-w69j-qggg","name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7m5h-w69j-qggg","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-40259","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40259","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"siyuan-note","product":"siyuan","version":"affected < 0.0.0-20260407035653-2f416e5253f1","platforms":[]},{"source":"CNA","vendor":"siyuan-note","product":"siyuan","version":"affected < 3.6.4","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"siyuan","vendor":"siyuan-note","versions":[{"status":"affected","version":"< 0.0.0-20260407035653-2f416e5253f1"},{"status":"affected","version":"< 3.6.4"}]}],"descriptions":[{"lang":"en","value":"SiYuan is an open-source personal knowledge management system. 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This issue has been fixed in version 3.6.4."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-285","description":"CWE-285: Improper Authorization","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-04-16T22:50:20.441Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7m5h-w69j-qggg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7m5h-w69j-qggg"},{"name":"https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4","tags":["x_refsource_MISC"],"url":"https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4"}],"source":{"advisory":"GHSA-7m5h-w69j-qggg","discovery":"UNKNOWN"},"title":"SiYuan: Publish Reader Can Arbitrarily Delete Attribute View Files via removeUnusedAttributeView API"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-40259","datePublished":"2026-04-16T22:49:36.992Z","dateReserved":"2026-04-10T17:31:45.787Z","dateUpdated":"2026-04-16T22:50:20.441Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-16 23:16:33","lastModifiedDate":"2026-04-16 23:16:33","problem_types":["CWE-285","CWE-285 CWE-285: Improper Authorization"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"40259","Ordinal":"1","Title":"SiYuan: Publish Reader Can Arbitrarily Delete Attribute View Fil","CVE":"CVE-2026-40259","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"40259","Ordinal":"1","NoteData":"SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, the /api/av/removeUnusedAttributeView endpoint is protected only by generic authentication that accepts publish-service RoleReader tokens. The handler passes a caller-controlled id directly to a model function that unconditionally deletes the corresponding attribute view file from the workspace without verifying that the caller has write privileges or that the target attribute view is actually unused. An authenticated publish-service reader can permanently delete arbitrary attribute view definitions by extracting publicly exposed data-av-id values from published content, causing breakage of database views and workspace rendering until manually restored. This issue has been fixed in version 3.6.4.","Type":"Description","Title":"SiYuan: Publish Reader Can Arbitrarily Delete Attribute View Fil"}]}}}