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CVE-2026-18639

Velociraptor OIDC Authenticator susceptible to email spoofing

Published: Aug 11, 2026Updated: Aug 11, 2026 Sources: CVE List NVDCWE-290
7.3HIGH
NVD MITRE
EPSS Score
0.3%
Top 81.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-290

Affected Products

Rapid7
commercial·USaka rapid7 velociraptor, metasploit, rapid7 nexpose
VelociraptorOn-premSecurity Product
Security Products / vuln-mgmt-scanner

Exploitability

Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

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

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