What’s Vulnerable › Vulnerabilities
CVE-2026-18639: Velociraptor OIDC Authenticator susceptible to email spoofing
- Severity: high (CVSS 7.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-11 · updated 2026-10-23
- Weakness: CWE-290
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.
Affected products
- Rapid7 Velociraptor: before 0.77.2 — fixed in 0.77.2
How to fix
Upgrade to a fixed version: Rapid7 Velociraptor 0.77.2. Check the vendor advisory for mitigations.
References
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