High severity · published Aug 26, 2026
CVE-2026-66003
Frappe: Access control bypass via REST API dot-notation fields on linked doctypes
7.1
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
frappe · frappe
< 15.115.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66003
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66003
github.com
https://github.com/frappe/frappe/releases/tag/v15.115.0
github.com
https://github.com/frappe/frappe/security/advisories/GHSA-p25m-7rvg-6fvr
More from frappe
9.8
CVE-2026-35614
Frappe has a SQL injection in bulk_update
9.8
CVE-2026-31877
Frappe SQL Injection due to improper field sanitization
9.8
CVE-2025-66205
Frappe is a full-stack web application framework
9.8
CVE-2019-14965
An issue was discovered in Frappe Framework 10 through 12 before 12.0.4
9.6
CVE-2025-67289
An arbitrary file upload vulnerability in the Attachments module of Frappe Framework v15.89.0 allows attackers to execute arbitrary code via uploading a crafted XML file