CVE-2026-45626Public exploitNetwork attack vector

Authenticated command injection via unsanitized browse path

Published May 29, 2026 · Updated May 29, 2026

OS command injection in Arcane 1.18.1 and earlier allows remote authenticated users to execute commands in a helper container. VolumeService.ListDirectory embeds the browse endpoint's path query parameter in a double-quoted sh -c find command after filtering traversal but not shell substitutions. Any authenticated role with volume-browse access can reach it; execution stays in a network-disabled, unprivileged helper with the target volume mounted read-only, while command output returns in HTTP 500 errors.

CVSS severity6.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Arcane 1.18.1 and earlier allows remote authenticated users to execute commands in a helper container. VolumeService.ListDirectory embeds the browse endpoint's path query parameter in a double-quoted sh -c find command after filtering traversal but not shell substitutions. Any authenticated role with volume-browse access can reach it; execution stays in a network-disabled, unprivileged helper with the target volume mounted read-only, while command output returns in HTTP 500 errors.

The record

CVE
CVE-2026-45626
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Arcane
Product
Arcane
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 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=<= 1.18.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Arcane · Arcaneversion=<= 1.18.1

Published CVSS scores

6.3GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

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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