VULNERABILITY INTELLIGENCE
CVE-2026-18639
CVSS score7.3 HIGH
EPSS probability0.39%
CISA KEVNot currently listed
Published2026-08-11
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
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.
Weakness classification
- cve@rapid7.com: CWE-290