CVE-2026-18639

Published: Aug 11, 2026Modified: Aug 28, 2026

7.3

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Exploitability: 2.1 / Impact: 5.2

Source: cve@rapid7.com (Secondary)

Description

When Velociraptor is configured to use an OIDC IdP for authentication, it uses the email claim as a username. However, some IdP allow users to change the email claim without verification. Some IdPs do not set the "email_verified" claim and do not actually verify the email. This allows a user to impersonate another user by setting their email address within the IdP, allowing account takeover.

Related CWEs

CWE-290

Authentication Bypass by Spoofing

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

References (1)

http://docs.velociraptor.app/announcements/advisories/cve-2026-18639/

Source: cve@rapid7.com

Timeline

No history available yet.