CVE-2026-45625 Arcane Backend: Missing admin authorization on git repository endpoints allows non-admin users to exfiltrate stored Git credentials and tamper with GitOps configs
Non-admin users can access Git repository endpoints to exfiltrate stored credentials and tamper with GitOps configurations due to missing authorization checks.
- 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-2026-45625?
CVE-2026-45625 is a critical 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 1.19.0, Arcane's huma-based REST API exposes nine endpoints under /api/customize/git-repositories and /api/git-repositories/sync for managing GitOps source repositories and their stored credentials. Eight of those endpoints (list, create, get, update, delete, test, listBranches, browseFiles) never call the checkAdmin(ctx) helper that every other admin-managed resource (container registries, environments, users, API keys, swarm, settings, system, notifications, events) uses, and the huma authentication middleware deliberately enforces only authentication, not the admin role. As a result, any logged-in user with the default user role can list, create, modify, delete, and test git repository configurations. By repointing an existing repository's URL to an attacker-controlled host while omitting the token/sshKey fields (which UpdateRepository only rewrites when explicitly supplied), the attacker causes Arcane to decrypt the legitimate PAT/SSH key on its next /test, /branches, or /files call and present it as HTTP Basic auth (or SSH key auth) to the attacker's host — producing a one-step exfiltration of plaintext Git credentials. This vulnerability is fixed in 1.19.0.
Weakness: CWE-862
Which versions are affected by CVE-2026-45625?
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 | 1.19.0 |
github.com/getarcaneapp/arcane/backend Go | All versions | 1.19.0 |
github.com/getarcaneapp/arcane/backend Go | All versions | 1.19.0 |
How do I fix CVE-2026-45625?
Upgrade github.com/getarcaneapp/arcane/backend to 1.19.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-45625 being exploited?
There is no known exploitation of CVE-2026-45625 in the wild and no public exploit code.
Sources
Also known as GHSA-7h26-hg47-p9hx, GO-2026-5220.