# CVE-2026-84173: Missing authorization in Eclipse Ankaios

> Authenticated workloads can bypass authorization rules to read or modify unauthorized cluster state due to incorrect wildcard evaluation.

- **Severity:** High 8.3 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Sep 2026
- **Updated:** 8 Sep 2026
- **Also known as:** GHSA-287g-w4gp-cqxr, GHSA-rp6v-x3q5-cp2g

## What is CVE-2026-84173?

CVE-2026-84173 is a high-severity missing authorization vulnerability in Eclipse Ankaios, published on 7 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 v0.5.1 through v1.0.1, the agent-side Control Interface authorizer incorrectly evaluates multi-segment allow rules whose first path segment is a wildcard. An authenticated workload with access restricted by such a rule can submit a CompleteStateRequest or UpdateStateRequest with an empty field mask. The request may then be incorrectly authorized as matching the scoped rule, allowing the workload to read the complete cluster state or replace state outside its authorized subtree. This may result in unauthorized disclosure or modification of other workloads and cluster configuration. Only a rule consisting solely of * is intended to authorize an empty mask.

Mitigation: Until an update containing the fix is installed, avoid multi-segment Control Interface allow-rule filter masks that begin with a wildcard, such as *.workloads.some_workload. Replace them with explicit paths such as desiredState.workloads.some_workload, where applicable. A filter mask consisting solely of * has different, intentionally unrestricted semantics and should only be used when full-state access is intended.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-84173?


## How do I fix CVE-2026-84173?

No fix has been published for CVE-2026-84173 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-84173 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84173 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-84173 and fix it if it is affected.

What it is: CVE-2026-84173 is a high-severity missing authorization vulnerability in Eclipse Ankaios, published on 7 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84173 exists.

Affected product: Eclipse Ankaios. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-84173/ (Markdown: https://insights.sbomify.com/CVE-2026-84173/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-84173
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-84173
- OSV: https://osv.dev/vulnerability/CVE-2026-84173

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-84173/
Summaries are generated and may contain mistakes; the official description above is the record.