CVE-2026-82586

Improper Protection of Alternate Path vulnerability in ash-project ash lua allows a user-supplied Lua script to read attributes that are not on the exposed-field allow-list.

AshLua exposes Ash resources to Lua scripts, gated by a manifest declaring which fields are exposed. The read action's operation aggregate path in AshLua.Runtime took the field name straight from the Lua call and resolved it with only String.to existing atom and Ash.Query.Aggregate.new!, neither of which consults the exposed-field allow-list the normal fields path enforces. A script can therefore read the value of any attribute of any record the actor may read, including private sensitive?: true columns, via resource.read({ operation = {"list", "hashed password"} }); min and max give a value oracle. Anyone able to submit or influence a Lua script can reach this.

This issue affects ash lua: from 0.1.0 before 0.2.1.

Reachable only when an application exposes AshLua scripting (the AshLua.Resource / AshLua.Domain extensions) to callers who can submit or influence Lua scripts, and the exposed resource has attributes that are not on the exposed-field surface.