CVE-2026-66057

Frappe is a full-stack web application framework. Prior to 15.116.0 and 16.29.0, the OAuth login flow uses an unsanitized client-controlled state parameter to select post-authentication navigation, allowing a crafted state value to redirect a user to an attacker-chosen location. This issue is fixed in versions 15.116.0 and 16.29.0.

• https://github.com/frappe/frappe/commit/12568e2d54c4abba70bc0261387053fa28f90988
• https://github.com/frappe/frappe/commit/1e0a3b941231d74a71ff1a43eee2e9f63c88712d
• https://github.com/frappe/frappe/commit/6ed8acd869199feb3a2598887d471448297edf07
• https://github.com/frappe/frappe/pull/40962
• https://github.com/frappe/frappe/releases/tag/v15.116.0
• https://github.com/frappe/frappe/releases/tag/v16.29.0
• https://github.com/frappe/frappe/security/advisories/GHSA-78c5-55xg-jm7m