CVE-2026-67579 Filter expression injection via forged keyset pagination cursor in Ash
Unauthenticated attackers can inject malicious filter expressions via forged pagination cursors, leading to SQL injection or code execution in Ash applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-67579?
CVE-2026-67579 is a high-severity unsafe deserialization vulnerability in ash-project ash, published on 12 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-67579?
1 open source package ship an affected version, including ash. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
ash Hex | From 1.17.0 | 3.31.3 |
Products include Ash-Hq Ash Framework.
How do I fix CVE-2026-67579?
Upgrade ash to 3.31.3 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-67579 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67579 exists.
Other vulnerabilities in ash-project ash
Sources
Also known as EEF-CVE-2026-67579, GHSA-3gq3-9xm3-c8v3.