Authorization Bypass in Instatic by CoreBunch
CVE-2026-125398

7.1HIGH

Key Information:

Vendor

Corebunch

Status
Instatic
Vendor
CVE Published:
9 November 2026

What is CVE-2026-125398?

Instatic versions prior to 0.0.21 have a vulnerability that allows authenticated users to bypass necessary table-level access controls. Specifically, users with the content.edit.any permission can exploit the API by utilizing the getDataRow() method instead of the secure loadRowForAccess(). This can lead to unauthorized read access to system-table rows and the ability to reassign authors, thereby compromising system integrity and user access rights.

Affected Version(s)

Instatic 0 < 0.0.21

References

https://github.com/CoreBunch/Instatic/security/advisories...
vendor-advisory
https://github.com/CoreBunch/Instatic/commit/ff1e51eb59c8...
patch
https://github.com/CoreBunch/Instatic/releases/tag/v0.0.21
release-notes

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sriman Aluvala
.