CVE-2026-47125 Arcane: Missing admin authorization on global variables endpoint
An authenticated non-admin user can overwrite global environment variables, potentially leading to remote code execution or credential theft on the Docker host.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47125?
CVE-2026-47125 is a high-severity missing authorization vulnerability in getarcaneapp arcane, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.19.2, the PUT /api/environments/{id}/templates/variables endpoint, which writes the system-wide .env.global file used for variable substitution in every project's compose file, is missing an admin authorization check. Any authenticated non-admin user can call this endpoint with their bearer token or API key and overwrite the global environment variables that are merged into every project deployment. By overriding values like REGISTRY, IMAGE, DATABASE_URL, or SECRET_KEY that other users reference via ${VAR} in compose files, an attacker can redirect image pulls to attacker-controlled registries (supply-chain RCE on the Docker host), exfiltrate database credentials, or disrupt all projects. This vulnerability is fixed in 1.19.2.
Weakness: CWE-862
Which versions are affected by CVE-2026-47125?
3 open source packages ship an affected version, including github.com/getarcaneapp/arcane/backend.
| Package | Affected | Fixed in |
|---|---|---|
github.com/getarcaneapp/arcane/backend Go | All versions | 1.19.2 |
github.com/getarcaneapp/arcane/backend Go | All versions | 1.19.2 |
github.com/getarcaneapp/arcane/backend Go | All versions | 1.19.2 |
How do I fix CVE-2026-47125?
Upgrade github.com/getarcaneapp/arcane/backend to 1.19.2 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-47125 being exploited?
There is no known exploitation of CVE-2026-47125 in the wild and no public exploit code.
Sources
Also known as GHSA-jpjh-jm2p-39hh, GO-2026-5476.