ash-project ash_typescript up to 0.17.x FieldFormatter field_formatter.ex Name allocation of resources

Summaryinfo

A vulnerability was found in ash-project ash_typescript up to 0.17.x. It has been classified as problematic. Affected by this vulnerability is the function AshTypescript.FieldFormatter.convert_to_field_atom of the file lib/ash_typescript/field_formatter.ex of the component FieldFormatter. This manipulation of the argument Name causes allocation of resources. This vulnerability is tracked as CVE-2026-74837. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in ash-project ash_typescript up to 0.17.x and classified as problematic. Affected by this vulnerability is the function AshTypescript.FieldFormatter.convert_to_field_atom of the file lib/ash_typescript/field_formatter.ex of the component FieldFormatter. The manipulation of the argument name with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. The summary by CVE is:

Allocation of Resources Without Limits or Throttling vulnerability in ash-project ash_typescript allows an unauthenticated attacker to exhaust the BEAM atom table and abort the node via client-supplied RPC field names. AshTypescript.FieldFormatter.convert_to_field_atom/2 in lib/ash_typescript/field_formatter.ex converts a client-supplied field name to an atom with String.to_atom/1 when no matching atom already exists. It delegates first to parse_input_field/2, which resolves the name with String.to_existing_atom/1 and falls back to returning the plain string; convert_to_field_atom/2 then mints an atom from that string rather than treating the name as unknown. RPC field selection reaches it for every requested field name through AshTypescript.Rpc.FieldProcessing.FieldSelector, which resolves each name before checking that the field exists, with no allowlist, length bound, or rate limit. Atoms are never garbage collected, so each distinct name mints a permanent one and the VM aborts once the atom table limit is reached. A field name over 255 characters additionally raises an uncaught SystemLimitError. This issue affects ash_typescript: from 0.1.0 before 0.18.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-74837 since 08/30/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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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
• 0.9
• 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/

CPE 2.3info

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CPE 2.2info

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