CVE-2026-6948Network attack vector

Server crash via unbounded VQLResponse allocation

Published May 3, 2026 · Updated May 4, 2026

Resource exhaustion in Rapid7 Velociraptor before 0.76.4 allows remote authenticated users to crash Linux servers via agent messages. The VQLResponse result-set writer accepts crafted client messages and allocates memory for their contents without an enforced resource limit. Control of an enrolled or rogue client is required; repeated messages exhaust server memory and terminate the service without reported data disclosure or modification.

CVSS severity4.9
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Rapid7 Velociraptor before 0.76.4 allows remote authenticated users to crash Linux servers via agent messages. The VQLResponse result-set writer accepts crafted client messages and allocates memory for their contents without an enforced resource limit. Control of an enrolled or rogue client is required; repeated messages exhaust server memory and terminate the service without reported data disclosure or modification.

The record

CVE
CVE-2026-6948
Published
May 3, 2026
Updated
May 4, 2026
Vendor
Rapid7
Product
Velociraptor
Classifications
CWE-770, CAPEC-130, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 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 <0.75.9
  2. Affected versionversion=0 <0.76.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Rapid7 · Velociraptorversion=0 <0.75.9; version=0 <0.76.4

Published CVSS scores

4.9Rapid7CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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