CVE-2026-125398

Instatic before 0.0.21 Authorization Bypass via Row Author Reassignment Endpoint

Published Nov 9, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Corebunch
Corebunch instatic
Vendors & Products Corebunch
Corebunch instatic
Type Values Removed Values Added
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.
Title Instatic before 0.0.21 Authorization Bypass via Row Author Reassignment Endpoint
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'}

cvssV4_0

{'score': 7.1, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 13, 2026, 2:52 PM
Reserved
Nov 9, 2026, 10:03 PM
Status
Deferred
Published
Nov 10, 2026, 12:17 AM
Modified
Nov 13, 2026, 3:17 PM