CVE-2026-18639

EUVD-2026-56187
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
rapid7CNA
7.3 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
rapid7velociraptor
𝑥
< 0.77.2
CNA
Common Weakness Enumeration
Vulnerability Media Exposure
References
http://docs.velociraptor.app/announcements/advisories/cve-2026-18639/