# CVE-2026-86836: Eclipse Ankaios agent FIFO hijacking via predictable path

Source: https://junglewise.ai/threats/cve-2026-86836-eclipse-ankaios-agent-fifo-hijacking-via-predictable-path  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-86836 · Severity: info · Published 2026-09-14

Eclipse Ankaios is a container orchestration platform used to manage workloads across distributed systems. The platform's agent component creates communication pipes (FIFOs) with predictable names and locations; an unprivileged local attacker can pre-create these pipes before the agent starts, allowing them to impersonate workloads and potentially read or modify the cluster's configuration and desired state.

Technologies: [Eclipse Ankaios](https://junglewise.ai/threats/technologies/ankaios). Vendors: [Eclipse](https://junglewise.ai/threats/vendors/eclipse).

## Quick answers

**Is CVE-2026-86836 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86836 being exploited in the wild.

**How severe is CVE-2026-86836?** Informational severity, published 14 September 2026.

**Which products and versions are affected?** Eclipse Ankaios 0.1.0 through 1.0.2.

**Is there a fix for CVE-2026-86836?** A patch was published on 2026-09-14: Fixed in v1.0.3 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-86836 attacked?** It is attacked with local access, in a hosted service.

**Am I affected by CVE-2026-86836?** Check whether you run Eclipse Ankaios at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a TOCTOU (time-of-check-time-of-use) race condition and insecure reuse of predictable temporary file paths. Eclipse Ankaios agents create Control Interface named pipes (FIFOs) in predictable locations under `$TMPDIR/ankaios` (typically `/tmp`) using a path derived from the agent name and a hash of the workload's runtime configuration. The agent checks only for existence and file type, not ownership or permissions, when reusing existing paths. A local, unprivileged user with write access to the base directory can pre-create the directory hierarchy and FIFOs before the agent starts; the agent then treats these attacker-owned FIFOs as legitimate, allowing the attacker to complete the Control Interface handshake and issue requests with the targeted workload's configured permissions. The vulnerability affects versions 0.1.0 through 1.0.2 and was patched in v1.0.3.

## Affected products

- Eclipse Ankaios 0.1.0 through 1.0.2

## Timeline

- 2026-09-14: disclosed
- 2026-09-14: patched: Fixed in v1.0.3

## References

- [https://github.com/eclipse-ankaios/ankaios/pull/799](https://github.com/eclipse-ankaios/ankaios/pull/799)
- [https://github.com/eclipse-ankaios/ankaios/releases/tag/v1.0.3](https://github.com/eclipse-ankaios/ankaios/releases/tag/v1.0.3)

## Related threats

- [Eclipse Ankaios authorization bypass in log access control](https://junglewise.ai/threats/cve-2026-92611-eclipse-ankaios-authorization-bypass-in-log-access-control)
- [Eclipse Ankaios agent unbounded memory allocation in Control Interface](https://junglewise.ai/threats/cve-2026-85201-eclipse-ankaios-agent-unbounded-memory-allocation-in-control)
- [Eclipse Ankaios authorization bypass via multi-segment wildcard rules](https://junglewise.ai/threats/cve-2026-84173-eclipse-ankaios-authorization-bypass-via-multi-segment-wildcard)