# CVE-2026-82733: ash-project ash_typescript information disclosure in error responses

Source: https://junglewise.ai/threats/cve-2026-82733-ash-project-ash-typescript-information-disclosure-in-error  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-01. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-82733 · Severity: info · CVSS 7.5 · Published 2026-09-01

ash_typescript is a TypeScript integration library for the Ash framework that processes HTTP requests. When a controller handler returns an unexpected value, the application returns a detailed error message containing sensitive data such as passwords, tokens, and tenant identifiers to unauthenticated users. This allows attackers to extract confidential information without authentication, posing a direct risk to account security and multi-tenant data isolation.

Technologies: [Ash-Project Ash Typescript](https://junglewise.ai/threats/technologies/ash-typescript). Vendors: [Ash-Project](https://junglewise.ai/threats/vendors/ash-project).

## Quick answers

**Is CVE-2026-82733 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82733 being exploited in the wild.

**How severe is CVE-2026-82733?** Informational severity, with a CVSS score of 7.5, published 1 September 2026.

**Which products and versions are affected?** Ash-Project Ash Typescript 0.15.0 to 0.17.x.

**Is there a fix for CVE-2026-82733?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-82733 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-82733?** Check whether you run Ash-Project Ash Typescript at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is an information disclosure vulnerability (CWE-209) in ash_typescript's request handler. When dispatch/3 in lib/ash_typescript/typed_controller/request_handler.ex encounters a return value that is not a %Plug.Conn{}, it passes the value to unexpected_return/2, which uses inspect(value, limit: 50) to serialize the value into the HTTP 500 response body. The limit option bounds collection elements rather than the entire term, causing nested structures like {:error, %User{}} or changesets to expose their full field sets, including hashed passwords and tokens. The vulnerability is unauthenticated (no credentials required) and network-accessible. Notably, the module gates Exception.message/1 behind a feature flag elsewhere, but this code path is ungated and always echoes sensitive data. The issue affects versions 0.15.0 through 0.17.x; version 0.18.0 and later include a fix.

## Affected products

- ash-project ash_typescript 0.15.0 to 0.17.x

## Timeline

- 2026-09-01: disclosed

## References

- [https://repo.hex.pm/](https://repo.hex.pm/)
- [https://github.com/](https://github.com/)

## Related threats

- [Ash TypeScript error message information disclosure](https://junglewise.ai/threats/cve-2026-105283-generation-of-error-message-containing-sensitive-information)
- [ash-project ash_typescript input validation bypass in TypedController](https://junglewise.ai/threats/cve-2026-82732-ash-project-ash-typescript-input-validation-bypass-in)
- [ash-project ash_typescript open redirect in typed controller routing](https://junglewise.ai/threats/cve-2026-82731-ash-project-ash-typescript-open-redirect-in-typed-controller)
- [ash-project ash_typescript unauthorized attribute disclosure in RPC](https://junglewise.ai/threats/cve-2026-82730-ash-project-ash-typescript-unauthorized-attribute-disclosure-in)
- [ash-project ash_typescript information disclosure in error handler](https://junglewise.ai/threats/cve-2026-77950-ash-project-ash-typescript-information-disclosure-in-error)