CVE-2026-66057

5.1Medium

Published 13 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

5.1Medium

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Active
Impact: Limited impact
Weakness: CWE-601

Impact

Attackers can redirect authenticated users to arbitrary external sites for phishing or credential theft. They need the user to click a specially crafted OAuth login link.

Root cause

The OAuth login flow redirects users using an unsanitized, client-controlled state parameter without URL validation.

Affected systems

Frappe versions prior to 15.116.0 and 16.29.0

CVSS v4.0 · 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

Fix & remediation

Upgrade Frappe to version 15.116.0 or 16.29.0 depending on your major release branch. No interim configuration mitigation is provided.

shell

$ bench update --apps frappe

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD 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.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-66057