# CVE-2026-82733

## Summary

- **CVE ID:** CVE-2026-82733
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-209
- **Published:** Sep 1, 2026
- **Last Modified:** Sep 1, 2026

## Description

Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal application data from an HTTP 500 response body.

When a typed-controller route handler returns anything other than a %Plug.Conn{}, dispatch/3 in lib/ash_typescript/typed_controller/request_handler.ex passes the value to unexpected_return/2, which interpolates inspect(value, limit: 50) directly into the response message. The limit option bounds elements per collection rather than the term as a whole, so a handler falling through with a term such as {:error, %User{}} or a changeset serialises its full field set, including hashed passwords, tokens, and tenant identifiers, into the JSON error returned to the caller.

This contradicts the module's own posture elsewhere: the rescue clause gates Exception.message/1 behind AshTypescript.typed_controller_show_raised_errors?/0 and otherwise returns a generic message, while this path is ungated and always echoes.

This issue affects ash_typescript: from 0.15.0 before 0.18.0.

## Affected Products

- ash-project — ash_typescript (0.15.0)
- ash-project — ash_typescript (546a15e1a2d7dbf1df2d5a6ee4404bc3da87852e)

## References

- [CNA](https://github.com/ash-project/ash_typescript/security/advisories/GHSA-ghhw-qh7p-55xr)
- [CNA](https://cna.erlef.org/cves/CVE-2026-82733.html)
- [CNA](https://osv.dev/vulnerability/EEF-CVE-2026-82733)
- [CNA](https://github.com/ash-project/ash_typescript/commit/dec80e29543f96e43eeece8501376562f17ac638)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.32%
- **EPSS Percentile:** 24.0

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