Rapid7 Velociraptor up to 0.76.5 client_info.json Hostname injection

Summaryinfo

A vulnerability was found in Rapid7 Velociraptor up to 0.76.5. It has been rated as critical. Affected by this issue is some unknown functionality of the file client_info.json. The manipulation of the argument Hostname leads to injection. This vulnerability is referenced as CVE-2026-8795. The attack can only be performed from a local environment. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Rapid7 Velociraptor up to 0.76.5. This issue affects an unknown function of the file client_info.json. The manipulation of the argument hostname with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A YAML injection vulnerability exists in the Windows.Collectors.Remapping artifact of Rapid7 Velociraptor before version 0.76.6. The hostname field in client_info.json inside a collection ZIP is inserted into a YAML template via Go's text/template without escaping. An attacker providing a crafted collection ZIP can leverage literal double quotes and newlines in the hostname to break out of the YAML quoted string and inject a new mount remapping entry. When an analyst applies the generated remapping file with --remap, arbitrary VQL executes on their machine with NullACLManager (all permissions granted, unsandboxed).

The weakness was published by Artificial Intelligence. The advisory is shared at docs.velociraptor.app. The identification of this vulnerability is CVE-2026-8795 since 05/18/2026. The exploitation is known to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1055 for this issue.

By approaching the search of inurl:client_info.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 0.76.6 eliminates this vulnerability.

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Productinfo

Vendor

• Rapid7

Name

• Velociraptor

Version

• 0.76.0
• 0.76.1
• 0.76.2
• 0.76.3
• 0.76.4
• 0.76.5

License

• commercial

CPE 2.3info

• 🔒
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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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