CVE-2026-67579: Ash-hq Ash Framework insecure deserialization (CVSS 7.4)

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.

CVSS 3.1 breakdown

Attack vectorLocal

Attack complexityHigh

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Ash-hq Ash Framework≥ 1.17.0 < 3.31.3

Remediation

Fixed in

Ash-hq Ash Framework≥ 3.31.3

Patch & vendor advisories

References

https://cna.erlef.org/cves/CVE-2026-67579.htmlThird Party AdvisoryPatch
https://github.com/ash-project/ash/commit/91874dd5435bc0ffebd8a254acfa573b39b74520Patch
https://github.com/ash-project/ash/security/advisories/GHSA-3gq3-9xm3-c8v3Vendor AdvisoryExploitPatch
https://osv.dev/vulnerability/EEF-CVE-2026-67579Third Party AdvisoryPatch

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-67579 being actively exploited?

CVE-2026-67579 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.61%.

How severe is CVE-2026-67579?

CVE-2026-67579 has a CVSS 3.1 base score of 7.4, rated high. EPSS estimates a 0.61% probability of exploitation.

Which products are affected by CVE-2026-67579?

Affected products include Ash-hq Ash Framework.

How do I fix CVE-2026-67579?

Upgrade affected software to a fixed version, for example Ash-hq Ash Framework 3.31.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-67579 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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