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CVE-2026-18638— Velociraptor server crash via the SetPassword API

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之前版本存在异常处理不当漏洞，该漏洞源于异常处理不当，可能导致经过身份验证的用户（包括仅持有reader角色）通过调用SetPassword并指定不存在的用户名终止整个服务器进程。

CVSS 6.5 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 1

VendorProduct Version RangeStatus
Rapid7 Velociraptor < 0.77.2 affected
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I. Basic Information for CVE-2026-18638

Vulnerability Information
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Vulnerability Title
Velociraptor server crash via the SetPassword API
Source: CVE Program / CVE List V5
Vulnerability Description
Any authenticated Velociraptor user — including one holding only the readerrole — can terminate the entire server process with a single request, by calling SetPassword with a username that does not exist.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Rapid7 velociraptor 异常处理不当漏洞
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之前版本存在异常处理不当漏洞，该漏洞源于异常处理不当，可能导致经过身份验证的用户（包括仅持有reader角色）通过调用SetPassword并指定不存在的用户名终止整个服务器进程。
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-2026-18638

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III. Intelligence Information for CVE-2026-18638

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Vendor Advisories for CVE-2026-18638 (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-2026-18639 7.3 HIGH Velociraptor OIDC Authenticator susceptible to email spoofing
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-2026-17535 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-476

V. Comments for CVE-2026-18638

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