CVE-2026-66057 Frappe: Open Redirect via Unsanitized OAuth State Param.
Attackers can redirect users to malicious sites via unsanitized OAuth state parameters in the Frappe web application framework.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-66057?
CVE-2026-66057 is a medium-severity vulnerability in frappe, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-601
Which versions are affected by CVE-2026-66057?
How do I fix CVE-2026-66057?
No fix has been published for CVE-2026-66057 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-66057 being exploited?
There is no known exploitation of CVE-2026-66057 in the wild and no public exploit code.
Sources
Also known as GHSA-78c5-55xg-jm7m.