CVE-2026-18639

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.

CVSS 3.1

7.3CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 32% of CVEs (scores of 2026-10-25)

CWE

CWE-290

Published

2026-08-11

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

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

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