CVE-2026-82586

AshLua read operation aggregate bypasses the exposed-field allow-list, exposing private attributes

HIGH

8.2

CVSS Score

Published: September 7, 2026 at 10:34 PM UTC

Updated: September 8, 2026 at 03:18 PM UTC

1 product affected across 1 vendorAshLua

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Severity

HIGH8.2

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

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.