Medium severity · published Aug 11, 2026
CVE-2026-18638
Velociraptor server crash via the SetPassword API
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VE
Velociraptor · Rapid7
before 0.77.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18638
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18638
docs.velociraptor.app
http://docs.velociraptor.app/announcements/advisories/cve-2026-18638/
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