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CVE-2026-23520

Arcane command injection

9.0 CRITICALPublic exploitEPSS 1.87%
  1. Published15 Jan 2026

Description

Arcane provides modern docker management. Prior to 1.13.0, Arcane has a command injection in the updater service. Arcane’s updater service supported lifecycle labels com.getarcaneapp.arcane.lifecycle.pre-update and com.getarcaneapp.arcane.lifecycle.post-update that allowed defining a command to run before or after a container update. The label value is passed directly to /bin/sh -c without sanitization or validation. Because any authenticated user (not limited to administrators) can create projects through the API, an attacker can create a project that specifies one of these lifecycle labels with a malicious command. When an administrator later triggers a container update (either manually or via scheduled update checks), Arcane reads the lifecycle label and executes its value as a shell command inside the container. This vulnerability is fixed in 1.13.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Arcane< 1.13.0

Remediation

Fixed in
Arcane≥ 1.13.0

References

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Frequently asked

Is CVE-2026-23520 being actively exploited?

CVE-2026-23520 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.87%.

How severe is CVE-2026-23520?

CVE-2026-23520 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 1.87% probability of exploitation.

Which products are affected by CVE-2026-23520?

Affected products include Arcane.

How do I fix CVE-2026-23520?

Upgrade affected software to a fixed version, for example Arcane 1.13.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.