# CVE-2026-78230

## Summary

- **CVE ID:** CVE-2026-78230
- **Severity:** MEDIUM
- **CVSS Score:** 6 (CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-1220
- **Published:** Sep 8, 2026
- **Last Modified:** Sep 8, 2026

## Description

AshAi exposes Ash read actions to language-model tool calls. The read tool accepts an aggregate result type (min, max, sum, avg) that builds an ad-hoc Ash.Query.Aggregate over a named field and returns its raw value.

Ash field policies redact forbidden fields on returned records (replacing them with %Ash.ForbiddenField{}), but that redaction does not apply to aggregate values. A tool caller could therefore read a field the calling actor's field policies forbid by requesting it as an aggregate; min/max in particular return an actual field value. This includes fields that are public? true but restricted per-actor by a field policy, such as sensitive PII. The tool's existing check only required the field to be public, which is a separate axis from per-actor field-policy authorization.

The fix authorizes the aggregated field against the resource's field policies, so aggregating over a field the actor may not see is refused or scoped to the rows where it is visible.

This issue affects ash_ai: from 0.1.0 before 1.0.3.

## Affected Products

- ash-project — ash_ai (0.1.0)
- ash-project — ash_ai (2ba234b50946a3b8116190c8467f9f4dfa5edce7)

## References

- [CNA](https://github.com/ash-project/ash_ai/security/advisories/GHSA-v5rw-36x5-r5vx)
- [CNA](https://cna.erlef.org/cves/CVE-2026-78230.html)
- [CNA](https://osv.dev/vulnerability/EEF-CVE-2026-78230)
- [CNA](https://github.com/ash-project/ash_ai/commit/2ba234b50946a3b8116190c8467f9f4dfa5edce7)
- [CNA](https://github.com/ash-project/ash_ai/commit/9c02de581625c342c9870a672830bff28c1d701e)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-09._