CVE-2026-86836 Race condition in Eclipse Ankaios
Local attackers can hijack workload control interfaces via race conditions in shared directories, enabling unauthorized state modification and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86836?
CVE-2026-86836 is a high-severity vulnerability in Eclipse Ankaios, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In Eclipse Ankaios versions 0.1.0 through 1.0.2, the agent creates workload files and Control Interface named pipes (FIFOs) under a predictable path derived from the agent name and a hash of the workload's runtime configuration. If a directory or FIFO already exists at that path when the agent (re)starts, the agent reuses it based only on an existence and/or file-type check, without validating its owner or permissions. A local, unprivileged user with write access to the same base directory (by default under `$TMPDIR/ankaios`, e.g. shared `/tmp`) can pre-create this path hierarchy, including the two Control Interface FIFOs, before the agent starts. The agent then treats the attacker-owned FIFOs as the legitimate Control Interface for the targeted workload. The attacker can complete the Control Interface handshake and issue requests using that workload's configured `controlInterfaceAccess` permissions, allowing impersonation of the workload and, depending on its configured permissions, unauthorized reading and/or modification of the cluster's desired state.
Which versions are affected by CVE-2026-86836?
How do I fix CVE-2026-86836?
No fix has been published for CVE-2026-86836 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-86836 being exploited?
There is no known exploitation of CVE-2026-86836 in the wild and no public exploit code.
Sources
Also known as GHSA-x544-76qg-7v6p.