Medium severity · published Oct 13, 2026
CVE-2026-66057
Frappe: Open Redirect via Unsanitized OAuth State Param.
5.1
CVSS
0.4%
EPSS
No
On KEV
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.
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
< 15.116.0; >= 16.0.0, < 16.29.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66057
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66057
x_refsource_CONFIRM
https://github.com/frappe/frappe/security/advisories/GHSA-78c5-55xg-jm7m
x_refsource_MISC
https://github.com/frappe/frappe/pull/40962
x_refsource_MISC
https://github.com/frappe/frappe/commit/12568e2d54c4abba70bc0261387053fa28f90988
x_refsource_MISC
https://github.com/frappe/frappe/commit/1e0a3b941231d74a71ff1a43eee2e9f63c88712d
x_refsource_MISC
https://github.com/frappe/frappe/commit/6ed8acd869199feb3a2598887d471448297edf07
x_refsource_MISC
https://github.com/frappe/frappe/releases/tag/v15.116.0
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