CVE-2026-66003

Frappe: Access control bypass via REST API dot-notation fields on linked doctypes

HIGH
7.1
CVSS Score
Published: August 26, 2026 at 07:30 PM UTC
Updated: September 9, 2026 at 09:27 PM UTC
1 product affected across 1 vendorFrappe

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Severity
HIGH7.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Frappe is a full-stack web application framework written in Python and JavaScript. Prior to version 15.115.0, an access control bypass in the REST API allows a user to read data from Linked DocTypes that they are not authorized to access. When a document references another document through a Link field, the framework does not consistently enforce the linked DocType's own permissions when the record is retrieved through the REST API, so a low-privileged authenticated user can obtain fields from linked records outside their permitted scope. This issue is fixed in version 15.115.0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 15.115.0
Affected range stops below 15.115.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-863

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