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VulnerabilityPublished

CVE-2026-18636: Rapid7 Velociraptor · Authentication bypass using an alternate path or channel

Affects Rapid7 VelociraptorSource CVE Database V5

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Not known to be exploited · CVSS 6.8 Medium : upgrade to 0.77.2 when convenient.

Data as of 7 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.77.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Upgrade Rapid7 Velociraptor to 0.77.2.

Affected software

ProductAffectedFixed in
Rapid7VelociraptorAffected
  • <0.77.2
Fixed in
  • 0.77.2
GitHubVelociraptorpkg:github/VelociraptorOther threatsAffected
  • <0.77.2
Fixed in
  • 0.77.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict read permissions in the ROOT organization to trusted users only and monitor access to sensitive files. Avoid granting broad read permissions that could be exploited via this vulnerability.

Description

The Velociraptor gRPC API has a VFSGetBuffer endpoint which allows reading files from the datastore. To prevent users from reading sensitive files or accessing other orgs, the requested path is prefix checked against a list of denied prefixes. This prefix check can be bypassed allowing a user to access usually denied files. If the user has read permission in the ROOT org, this allows access to other orgs, in which the user may not have permission.

References

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