# CVE-2026-82586 — ash-project ash_lua

> As of 2026-09-08, CVE-2026-82586 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in ash-project ash_lua, CVSS v4.0 8.2, EPSS 0.3% (25.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-82586 as of 2026-09-08; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-08

## What is 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.

The record classifies CVE-2026-82586 under weakness class [CWE-424](https://cwe.mitre.org/data/definitions/424.html). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 28 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 8.2 — High (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 25.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-07, last modified 2026-09-08

## Is CVE-2026-82586 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [ash-project](https://intel.threadlinqs.com/vendors/ash-project): ash_lua

## How to fix CVE-2026-82586

No vendor patch reference has been recorded for CVE-2026-82586 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-82586

No threat campaign in the Threadlinqs corpus currently references CVE-2026-82586, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-09-08. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — vendor advisory](https://github.com/ash-project/ash_lua/security/advisories/GHSA-37jv-wc37-fhcw)
- [github.com — patch](https://github.com/ash-project/ash_lua/commit/c0dfcd9494766d548178c37df0bd01cff378e1c7)

**Other references**

- [cna.erlef.org — related](https://cna.erlef.org/cves/CVE-2026-82586.html)
- [osv.dev — related](https://osv.dev/vulnerability/EEF-CVE-2026-82586)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-82586
Full detection coverage and IOCs for threats exploiting CVE-2026-82586 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp