{"id":"CVE-2026-125398","state":"PUBLISHED","title":"Instatic before 0.0.21 Authorization Bypass via Row Author Reassignment Endpoint","description":"Instatic before 0.0.21 contains an authorization bypass vulnerability in handleRowAuthor that allows authenticated users to skip table-level access checks by loading rows with getDataRow() instead of loadRowForAccess(). Attackers holding content.edit.any but lacking data.system.tables.read can send PATCH requests to /admin/api/cms/data/rows/:id/author to read system-table rows and reassign their authors.","publishedAt":"2026-11-09T23:28:01.464Z","updatedAt":"2026-11-09T23:28:01.464Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["CoreBunch Instatic"],"affected":[{"vendor":"CoreBunch","product":"Instatic","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.0.21","versionType":"semver"}],"repo":"https://github.com/CoreBunch/Instatic"}],"references":["https://github.com/CoreBunch/Instatic/security/advisories/GHSA-m425-wmrc-4v4v","https://github.com/CoreBunch/Instatic/commit/ff1e51eb59c860864fa24e8c3e2716b56314f3ad","https://github.com/CoreBunch/Instatic/releases/tag/v0.0.21","https://github.com/CoreBunch/Instatic/blob/v0.0.20/server/handlers/cms/data/rows.ts#L378-L398","https://www.vulncheck.com/advisories/instatic-before-0.0.21-authorization-bypass-via-row-author-reassignment-endpoint"],"weaknesses":["CWE-862"],"ingestedAt":"2026-11-09T23:36:06.628Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/125xxx/CVE-2026-125398.json","commit":"b5e35fd13cceb3fc2d7ace24f43c95cd80e7dc5f","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-125398","state":"PUBLISHED","datePublished":"2026-11-09T23:28:01.464Z","dateUpdated":"2026-11-09T23:28:01.464Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-11-09T22:03:14.422Z"},"containers":{"cna":{"title":"Instatic before 0.0.21 Authorization Bypass via Row Author Reassignment Endpoint","descriptions":[{"lang":"en","value":"Instatic before 0.0.21 contains an authorization bypass vulnerability in handleRowAuthor that allows authenticated users to skip table-level access checks by loading rows with getDataRow() instead of loadRowForAccess(). Attackers holding content.edit.any but lacking data.system.tables.read can send PATCH requests to /admin/api/cms/data/rows/:id/author to read system-table rows and reassign their authors."}],"affected":[{"vendor":"CoreBunch","product":"Instatic","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.0.21","versionType":"semver"}],"repo":"https://github.com/CoreBunch/Instatic"}],"references":[{"url":"https://github.com/CoreBunch/Instatic/security/advisories/GHSA-m425-wmrc-4v4v","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-m425-wmrc-4v4v)"},{"url":"https://github.com/CoreBunch/Instatic/commit/ff1e51eb59c860864fa24e8c3e2716b56314f3ad","tags":["patch"]},{"url":"https://github.com/CoreBunch/Instatic/releases/tag/v0.0.21","tags":["release-notes"],"name":"Instatic v0.0.21 Release Notes"},{"url":"https://github.com/CoreBunch/Instatic/blob/v0.0.20/server/handlers/cms/data/rows.ts#L378-L398","tags":["technical-description"]},{"url":"https://www.vulncheck.com/advisories/instatic-before-0.0.21-authorization-bypass-via-row-author-reassignment-endpoint","name":"VulnCheck Advisory: Instatic before 0.0.21 Authorization Bypass via Row Author Reassignment Endpoint","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-11-09T23:28:01.464Z"},"datePublic":"2026-11-03T00:00:00.000Z","credits":[{"lang":"en","value":"Sriman Aluvala","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}}