Impersonation Risk in Velociraptor Due to Insecure Email Claim Handling
CVE-2026-18639

7.3HIGH

Key Information:

Vendor

Rapid7

Status
Velociraptor
Vendor
CVE Published:
11 August 2026

What is CVE-2026-18639?

Velociraptor's configuration to use an OIDC IdP for authentication poses a significant risk, as it relies on the email claim for username identification. Some Identity Providers (IdPs) permit users to modify their email claims without proper verification, and lack the 'email_verified' claim. This deficiency can lead to unauthorized users impersonating others by simply altering their email address within the IdP, thus allowing potential account takeover incidents of unsuspecting users.

Affected Version(s)

Velociraptor 0 < 0.77.2

References

http://docs.velociraptor.app/announcements/advisories/cve...

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Leonardo Souza (anauaque)
.