CVE-2026-82733
Received Received - Intake

Information Disclosure in ash_typescript

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: EEF

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.

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Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-82733
EUVD
EUVD-2026-68928

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ash-project ash_typescript From 0.15.0 (inc) to 0.18.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-209 The product generates an error message that includes sensitive information about its environment, users, or associated data.

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Executive Summary

This vulnerability allows an unauthenticated attacker to read sensitive internal application data through HTTP 500 error responses. When a route handler returns a value other than a %Plug.Conn{} struct, the system includes the full inspection of that value in the error response, potentially exposing hashed passwords, tokens, or tenant identifiers.

Detection Guidance

To detect this vulnerability, monitor HTTP 500 error responses for sensitive data exposure. Check if route handlers in ash_typescript return non-%Plug.Conn{} values. Review server logs for error messages containing internal struct fields like passwords or tokens. Use network inspection tools to capture error responses.

Impact Analysis

An attacker could exploit this to access sensitive data like user passwords, tokens, or internal identifiers, leading to potential data breaches, unauthorized access, or compliance violations. The impact depends on the data processed by the application.

Compliance Impact

This vulnerability could lead to unauthorized exposure of personal or sensitive data, violating GDPR's data protection principles and HIPAA's safeguards for protected health information. Non-compliance may result in legal penalties or reputational damage.

Mitigation Strategies

Upgrade ash_typescript to version 0.18.0 or later. Set typed_controller_show_raised_errors to false in configuration to prevent sensitive data in error responses. Review and update route handlers to ensure they return %Plug.Conn{} structs. Monitor error logs for unexpected return values.

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