Instatic before 0.0.21 contains a missing authorization vulnerability in its AI/MCP content read tools that allows low-privileged authenticated users with ai.chat and content.edit.own capabilities to access data rows belonging to other users by calling content_get_document and content_list_documents without the object-level authorization checks enforced by the normal HTTP API. Attackers can use the MCP interface to retrieve private or unpublished draft content and enumerate rows from the posts system table, resulting in cross-user data disclosure.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 03 Nov 2026 13:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Instatic before 0.0.21 contains a missing authorization vulnerability in its AI/MCP content read tools that allows low-privileged authenticated users with ai.chat and content.edit.own capabilities to access data rows belonging to other users by calling content_get_document and content_list_documents without the object-level authorization checks enforced by the normal HTTP API. Attackers can use the MCP interface to retrieve private or unpublished draft content and enumerate rows from the posts system table, resulting in cross-user data disclosure. | |
| Title | Instatic before 0.0.21 Authorization Bypass via MCP Content Read Tools | |
| First Time appeared |
Corebunch
Corebunch instatic |
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| Weaknesses | CWE-862 | |
| CPEs | cpe:2.3:a:corebunch:instatic:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Corebunch
Corebunch instatic |
|
| References |
| |
| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-03T12:59:17.285Z
Reserved: 2026-11-03T12:47:04.613Z
Link: CVE-2026-121458
No data.
Status : Received
Published: 2026-11-03T13:17:21.997
Modified: 2026-11-03T13:17:21.997
Link: CVE-2026-121458
No data.
OpenCVE Enrichment
Updated: 2026-11-03T14:45:17Z
Weaknesses