# CVE-2026-78693

## Summary

- **CVE ID:** CVE-2026-78693
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-209
- **Published:** Aug 30, 2026
- **Last Modified:** Aug 31, 2026

## Description

Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_graphql allows a remote client to read internal field names that an application configured its error_handler to redact.

In AshGraphql.Errors, each error is passed to the configured error_handler and the returned map is merged with the pre-handler path via Map.put_new(handled, :path, path). Because put_new defers to the handler only when the handler itself set :path, a sanitizing handler that returns a fresh map or deletes :path has that decision reverted. The re-injected path comes from build_error_path/5, which falls back to raw internal Ash attribute and argument names when no field_names mapping is configured. A validation failure on a non-exposed or nested field therefore returns internal names in the GraphQL error path, defeating the application's redaction.

This issue affects ash_graphql: from 1.9.0 before 1.11.0.

## Affected Products

- ash-project — ash_graphql (1.9.0)
- ash-project — ash_graphql (6d2d8d995906d68cc245d209a9b3f9853405eb61)

## References

- [CNA](https://github.com/ash-project/ash_graphql/security/advisories/GHSA-ppr2-g9h8-w7qp)
- [CNA](https://cna.erlef.org/cves/CVE-2026-78693.html)
- [CNA](https://osv.dev/vulnerability/EEF-CVE-2026-78693)
- [CNA](https://github.com/ash-project/ash_graphql/commit/78e90d369f09f44c534816de541e60841066a467)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 22.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._