CVE-2026-48105Network attack vector

Authenticated cluster data manipulation via unchecked paths

Published Aug 21, 2026 · Updated Aug 21, 2026

Path traversal in Basekick Labs Arc Enterprise before 2026.06.1 allows remote authenticated users to manipulate cluster data via manifest proposals. The Raft FSM's applyRegisterFile handler accepts any nonempty proposal path without rejecting traversal, absolute paths, foreign schemes, or excessive lengths. A valid cluster credential or compromised node is required; replicated entries can expose host files or insert attacker-controlled Parquet data into query results.

CVSS severity8.3
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Basekick Labs Arc Enterprise before 2026.06.1 allows remote authenticated users to manipulate cluster data via manifest proposals. The Raft FSM's applyRegisterFile handler accepts any nonempty proposal path without rejecting traversal, absolute paths, foreign schemes, or excessive lengths. A valid cluster credential or compromised node is required; replicated entries can expose host files or insert attacker-controlled Parquet data into query results.

The record

CVE
CVE-2026-48105
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
Basekick Labs
Product
Arc
Classifications
CWE-913, CWE-345, CWE-22, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=< 2026.06.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Basekick Labs · Arcversion=< 2026.06.1

Published CVSS scores

8.3GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

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-913Improper Control of Dynamically-Managed Code Resources
CWE-345Insufficient Verification of Data Authenticity
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1565.001Stored Data Manipulation

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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