CVE-2026-18638
Velociraptor server crash via the SetPassword API
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Velociraptor server crash via the SetPassword API
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.
- Record
CVE-2026-18638- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476, CWE-703
- Updated
- 2026-11-02
EUVDEUVD-2026-56185
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.
- Record
EUVD-2026-56185- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-79v4-qf48-mh94
Any authenticated Velociraptor user — including one holding only the readerrole — can terminate...
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.
- Record
GHSA-79v4-qf48-mh94- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-18638- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476, CWE-703
- Updated
- 2026-11-02
OSV
Velociraptor server crash via the SetPassword API
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.
- Record
CVE-2026-18638- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476, CWE-703
- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:12070-1 No score
velociraptor-0.76.7.0.git145.b60ef1146-1.1 on GA media
These are all security issues fixed in the velociraptor-0.76.7.0.git145.b60ef1146-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:12070-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
velociraptoropenSUSE:Tumbleweed From an advisory covering 40 CVEs |
before 0.76.7.0.git145.b60ef1146-1.1 | 0.76.7.0.git145.b60ef1146-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-18638 is a medium vulnerability (CVSS 6.5) in Rapid7 Velociraptor, published August 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.
References
docs.velociraptor.app/announcements/advisories/cve-2026-18638
nvd.nist.gov/vuln/detail/CVE-2026-18638
github.com/advisories/GHSA-79v4-qf48-mh94
suse.com/security/cve/CVE-2025-0914
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