CVE-2026-18640Network attack vectorHinoki check available

Authenticated metadata overwrite via notebook ID traversal

Published Aug 11, 2026 · Updated Aug 11, 2026

Path traversal in Rapid7 Velociraptor before 0.77.2 allows remote authenticated users to overwrite server metadata via NewNotebook. The notebook path manager uses an attacker-controlled notebook ID in datastore path construction without removing dot-dot sequences, and the file writer truncates the resulting .json.db path. An analyst role with NOTEBOOK_EDIT permission is required; crafted paths can corrupt ACL, hunt, or other metadata records.

CVSS severity7.1
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in Rapid7 Velociraptor before 0.77.2 allows remote authenticated users to overwrite server metadata via NewNotebook. The notebook path manager uses an attacker-controlled notebook ID in datastore path construction without removing dot-dot sequences, and the file writer truncates the resulting .json.db path. An analyst role with NOTEBOOK_EDIT permission is required; crafted paths can corrupt ACL, hunt, or other metadata records.

The record

CVE
CVE-2026-18640
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Rapid7
Product
Velociraptor
Classifications
CWE-22, CAPEC-126, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.77.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Rapid7 · Velociraptorversion=0 <0.77.2

Published CVSS scores

7.1Rapid7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC-126Path Traversal
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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