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CVE-2026-18639— Velociraptor OIDC Authenticator susceptible to email spoofing

Quick assessment

Affected
Rapid7 Velociraptor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rapid7 velociraptor是美国Rapid7公司开源的一款终端安全与响应工具。 Rapid7 velociraptor 0.77.2之前版本存在授权问题漏洞，该漏洞源于使用OIDC IdP认证时将email claim作为用户名，且部分IdP允许用户未经验证地更改email claim，可能导致用户冒充其他用户，造成账户接管。

CVSS 7.3 · High EPSS 0.39% · P30

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 1

VendorProduct Version RangeStatus
Rapid7 Velociraptor < 0.77.2 affected
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I. Basic Information for CVE-2026-18639

Vulnerability Information
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Vulnerability Title
Velociraptor OIDC Authenticator susceptible to email spoofing
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Rapid7 velociraptor 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rapid7 velociraptor是美国Rapid7公司开源的一款终端安全与响应工具。 Rapid7 velociraptor 0.77.2之前版本存在授权问题漏洞，该漏洞源于使用OIDC IdP认证时将email claim作为用户名，且部分IdP允许用户未经验证地更改email claim，可能导致用户冒充其他用户，造成账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Rapid7 Velociraptor 0 ~ 0.77.2 -

II. Public POCs for CVE-2026-18639

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III. Intelligence Information for CVE-2026-18639

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Vendor Advisories for CVE-2026-18639 (1)

Same Patch Batch · Rapid7 · 2026-08-11 · 9 CVEs total

CVE-2026-18972 9.6 CRITICAL Velociraptor authenticated identity-spoofing vulnerability
CVE-2026-18860 8.7 HIGH Velociraptor incorrect Org deletion permissions check
CVE-2026-18635 7.2 HIGH Velociraptor query plugin allows impersonation in other orgs
CVE-2026-18640 7.1 HIGH Velociraptor directory traversal via the NewNotebook API
CVE-2026-18636 6.8 MEDIUM Velociraptor VFSGetBuffer API path deny list bypass
CVE-2026-18638 6.5 MEDIUM Velociraptor server crash via the SetPassword API
CVE-2026-17535 6.2 MEDIUM Velociraptor Multiple Crashes in NTFS Parser when applied to invalid NTFS Volumes
CVE-2026-18348 4.1 MEDIUM Velociraptor NETWORK ACL bypass via upload_azure / upload_sftp / upload_smb VQL plugins

IV. Related Vulnerabilities

Same product: Velociraptor
Same vendor: Rapid7
Same weakness: CWE-290

V. Comments for CVE-2026-18639

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