CVE-2026-86114 Arcane before 2.0.0 Missing Administrator Authorization on the Compose Template Mutation Endpoints
Attackers with default user roles can modify compose templates to inject malicious configurations, leading to privilege escalation and code execution when deployed by administrators.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86114?
CVE-2026-86114 is a high-severity missing authorization vulnerability in getarcaneapp arcane, published on 5 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Arcane versions before 2.0.0 fail to properly restrict template operations, allowing default user role accounts to create, modify, and delete compose templates including instance-wide defaults. Attackers can inject malicious container configurations with privileged settings or host path mounts that execute with administrative privileges when deployed by administrators.
Weakness: CWE-862
Which versions are affected by CVE-2026-86114?
How do I fix CVE-2026-86114?
No fix has been published for CVE-2026-86114 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-86114 being exploited?
There is no known exploitation of CVE-2026-86114 in the wild and no public exploit code.
Sources
Also known as GHSA-pj2x-fr4j-wrxq.