---
cve: "CVE-2026-67579"
severity: "HIGH"
cvss: 7.5
epss: "40%"
vendor: "ash-project"
kev: false
exploited: false
published: "2026-08-12 20:17:48"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T07:09:54+02:00"
---

# CVE-2026-67579

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Deserialization of Untrusted Data vulnerability in ash-project ash allows an unauthenticated attacker to inject a filter expression through a forged keyset pagination cursor, resulting in SQL injection or code execution depending on the data layer.

Read actions with keyset pagination decode the client-supplied page[:after] or page[:before] cursor in decode_values/2 in lib/ash/page/keyset.ex using non_executable_binary_to_term/2 with [:safe]. That guard blocks new atoms, funs, and ports, but not a struct built from atoms already interned in a running Ash application, so a decoded %Ash.Query.Call{} expression survives and is spliced into the keyset filter as a comparison value in do_filters/4 and evaluated. Because the cursor bypasses the Ash.Expr macro, the runtime never applies the private?/public? gate that would otherwise reject it. On AshPostgres the injected fragment is inlined into the SQL query; on the ETS and Simple data layers it is evaluated in-process as an arbitrary function call.

This issue affects ash: from 1.17.0 before 3.31.3.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 2632fdf77b4280a3b192e7edbb7b8303df001722 (Commit)
- 91874dd5435bc0ffebd8a254acfa573b39b74520 (Commit)

## Referenzen

- <https://github.com/ash-project/ash/security/advisories/GHSA-3gq3-9xm3-c8v3>
- <https://cna.erlef.org/cves/CVE-2026-67579.html>
- <https://osv.dev/vulnerability/EEF-CVE-2026-67579>
- <https://github.com/ash-project/ash/commit/91874dd5435bc0ffebd8a254acfa573b39b74520>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67579) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_