{"affected":[{"defaultStatus":"unaffected","product":"Instatic","source":"CNA: VulnCheck","vendor":"CoreBunch","versions":[{"lessThan":"0.0.21","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-125398","cwes":["CWE-862"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: VulnCheck","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","version":"4.0"},{"score":7.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","version":"3.1"}],"modifiedAt":1794266881464,"publishedAt":1794266881464,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/CoreBunch/Instatic/security/advisories/GHSA-m425-wmrc-4v4v"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/CoreBunch/Instatic/commit/ff1e51eb59c860864fa24e8c3e2716b56314f3ad"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/CoreBunch/Instatic/releases/tag/v0.0.21"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/CoreBunch/Instatic/blob/v0.0.20/server/handlers/cms/data/rows.ts#L378-L398"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/instatic-before-0.0.21-authorization-bypass-via-row-author-reassignment-endpoint"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/CoreBunch/Instatic/commit/ff1e51eb59c860864fa24e8c3e2716b56314f3ad"}],"revision":"041e7747800dd703b6e4bb62e19d2ddc23ea84c862e078ee30e0c99f0f900482","sources":[{"modifiedAt":1794266881464,"name":"CNA: VulnCheck","retrievedAt":1794269364948,"url":"https://www.cve.org/CVERecord?id=CVE-2026-125398"}],"ssvc":null,"status":"published","title":"Instatic before 0.0.21 Authorization Bypass via Row Author Reassignment Endpoint","updatedAt":1794269364948}