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Vulnerability record · CVE-2026-66001 · published 20 August 2026

CVE-2026-66001: Cross-site request forgery vulnerability

Frappe is a full-stack web application framework. Prior to 15.114.0 and 16.26.0, the approve and authorize functions in frappe/integrations/oauth2.py allow the OAuth2 consent flow to proceed without restricting approve to POST, without a csrf_token in frappe/templates/includes/oauth_confirmation.html, and without scoping an active OAuth token check to the requesting client. An attacker can cause an authenticated user to approve an OAuth grant or reuse authorization state for the wrong client, exposing data and permitting actions within the granted scopes. This issue is fixed in versions 15.114.0 and 16.26.0.

8.5 CVSS 4.0 High EPSS 0.34% · top 75.1% CWE-352 · Cross-site request forgery Deferred
8.5CVSS 4.0 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
9References
16 Sep 2026Last modified by NVD

Description

Frappe is a full-stack web application framework. Prior to 15.114.0 and 16.26.0, the approve and authorize functions in frappe/integrations/oauth2.py allow the OAuth2 consent flow to proceed without restricting approve to POST, without a csrf_token in frappe/templates/includes/oauth_confirmation.html, and without scoping an active OAuth token check to the requesting client. An attacker can cause an authenticated user to approve an OAuth grant or reuse authorization state for the wrong client, exposing data and permitting actions within the granted scopes. This issue is fixed in versions 15.114.0 and 16.26.0.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/frappe/frappe/commit/336c7d335db762b494acdfe43aea69d459fd51d7
https://github.com/frappe/frappe/commit/d7460769f999c68d3121b680119f8724ddd3eb9d
https://github.com/frappe/frappe/commit/eb9c1446cac13236c6d573b136786db2e46254fa
https://github.com/frappe/frappe/pull/40073
https://github.com/frappe/frappe/pull/40700
https://github.com/frappe/frappe/pull/40701
https://github.com/frappe/frappe/releases/tag/v15.114.0
https://github.com/frappe/frappe/releases/tag/v16.26.0
https://github.com/frappe/frappe/security/advisories/GHSA-2ph8-x773-8p2x

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Source: NIST National Vulnerability Database (record CVE-2026-66001), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.