CVE-2026-18348 Velociraptor NETWORK ACL bypass via upload_azure / upload_sftp / upload_smb VQL plugins
Authenticated analysts can bypass network ACLs via upload plugins to perform internal reconnaissance and exfiltrate data.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-18348?
CVE-2026-18348 is a medium-severity missing authorization vulnerability in Rapid7 Velociraptor, published on 11 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Missing authorization check in the upload_azure, upload_sftp, and upload_smb VQL plugins allows an authenticated analyst-role user can initiate attacker-controlled outbound network connections from the Velociraptor server, bypassing the NETWORK ACL permission boundary. This enables internal network reconnaissance via port oracle and potential data exfiltration to external endpoints.
Weakness: CWE-863
Which versions are affected by CVE-2026-18348?
How do I fix CVE-2026-18348?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18348 being exploited?
There is no known exploitation of CVE-2026-18348 in the wild and no public exploit code.
Sources
Also known as GHSA-qx94-26r3-gv6g.