Frappe: Open Redirect via Unsanitized OAuth State Param.

published 2026-10-13 26 d ago modified 2026-10-14 25 d ago also EUVD-2026-98927

cvss: 5.1; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits: 0; none known

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.

Patch / fix

links 6

github.com/frappe/frappe@12568e2 commit
github.com/frappe/frappe@1e0a3b9 commit
github.com/frappe/frappe@6ed8acd commit
github.com/frappe/frappe#40962 pull request
github.com/frappe/frappe/releases/tag/v15.116.0 release
github.com/frappe/frappe/releases/tag/v16.29.0 release

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 25 d ago (2026-10-14)

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CNA	4.0	5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/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:X/V:X/RE:X/U:X

Affected products

frappe frappe

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site

References

Sources

CVE List CVE-2026-66057
NVD CVE-2026-66057

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary