ash-project ash_typescript up to 0.8.0/0.17.x Error handler errors.ex apply_error_handler information exposure

Summaryinfo

A vulnerability labeled as problematic has been found in ash-project ash_typescript up to 0.8.0/0.17.x. Impacted is the function apply_error_handler of the file lib/ash_typescript/rpc/errors.ex of the component Error handler. The manipulation results in information exposure. This vulnerability is reported as CVE-2026-77950. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic has been found in ash-project ash_typescript up to 0.8.0/0.17.x. Affected is the function apply_error_handler of the file lib/ash_typescript/rpc/errors.ex of the component Error handler. The manipulation with an unknown input leads to a information exposure vulnerability. CWE is classifying the issue as CWE-209. The product generates an error message that includes sensitive information about its environment, users, or associated data. This is going to have an impact on confidentiality. CVE summarizes:

Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to receive unredacted internal error data by provoking an error shape the configured error handler does not match. apply_error_handler/3 in lib/ash_typescript/rpc/errors.ex is the only hook an application has for redacting or suppressing errors before they reach the client, with a nil return dropping the error entirely. Its rescue clause logs a warning and then returns the original, pre-handler error map. Error handlers are conventionally written as pattern-matching functions over expected error shapes, so an unmatched shape raises FunctionClauseError and the raw transformed error, including any secrets carried in vars, is emitted instead. An intent to suppress an error becomes an intent to publish it. The rescue catches exceptions only, so a handler that throws or exits still propagates. This issue affects ash_typescript: from 0.8.0 before 0.18.0.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-77950 since 08/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 0.18.0 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• ash-project

Name

• ash_typescript

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.8.0
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17

Website

• Product: https://github.com/ash-project/ash_typescript/

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