CVE-2026-105283 Internal error terms inspected into AshTypescript RPC error responses
An unauthenticated attacker can read internal Elixir terms from RPC error responses by triggering specific errors in the ash_typescript library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-105283?
CVE-2026-105283 is a medium-severity vulnerability in ash-project ash_typescript, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal Elixir terms from an RPC error response by provoking an error the error builder has no dedicated clause for.
AshTypescript.Rpc.ErrorBuilder.build_error_response/1 in lib/ash_typescript/rpc/error_builder.ex renders a pipeline error term that matches no specific clause with inspect/1 and places the result in details.error of the client-facing error. Ash exceptions take a separate path in AshTypescript.Rpc.Errors where unhandled cases are redacted behind an errorId, but these fallbacks have no redaction, so whatever the term carries reaches the HTTP or channel response. Two request paths hand it such terms: a struct-typed action argument with an invalid nested value, where cast_map_to_struct/2 in lib/ash_typescript/rpc/input_formatter.ex throws the raw Ash.Type cast error into the builder, and field selection on a generic action that returns a primitive, where format_field_type/1 inspects the full Ash.Info.Manifest.Type struct into vars.returnType. Resource module names in vars.resource are not treated as sensitive and are out of scope.
This issue affects ash_typescript: from 0.1.0 before 0.19.1.
Weakness: CWE-209
Which versions are affected by CVE-2026-105283?
1 open source package ship an affected version, including ash_typescript.
| Package | Affected | Fixed in |
|---|---|---|
ash_typescript Hex | From 0.1.0 | 0.19.1 |
How do I fix CVE-2026-105283?
Upgrade ash_typescript to 0.19.1 or later.
Is CVE-2026-105283 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-105283 exists.
Sources
Also known as EEF-CVE-2026-105283, GHSA-7gxc-w225-f7f3.