getarcaneapp arcane up to 1.18.1 Query Parameter browse os command injection

Summaryinfo

A vulnerability was found in getarcaneapp arcane up to 1.18.1. It has been classified as critical. This affects an unknown function of the file /environments/{id}/volumes/{volumeName}/browse of the component Query Parameter Handler. This manipulation causes os command injection. The identification of this vulnerability is CVE-2026-45626. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in getarcaneapp arcane up to 1.18.1. Affected by this vulnerability is an unknown code block of the file /environments/{id}/volumes/{volumeName}/browse of the component Query Parameter Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Arcane is an interface for managing Docker containers, images, networks, and volumes. In 1.18.1 and earlier, GET /environments/{id}/volumes/{volumeName}/browse accepts a path query parameter that is passed to a shell command (sh -c "find … | while …") inside an Arcane helper container. The path sanitiser blocks ../ traversal but does not strip Bourne-shell metacharacters such as $() or backticks, and strconv.Quote only escapes Go string metacharacters, not shell substitution sequences. Any authenticated user with access to a browseable volume can execute arbitrary commands inside the helper container; command output is reflected back in the 500 error body.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-45626 since 05/12/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/29/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• getarcaneapp

Name

• arcane

Version

• 1.18.0
• 1.18.1

Website

• Product: https://github.com/getarcaneapp/arcane/

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