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Vulnerability record · CVE-2026-34593 · published 2 April 2026

CVE-2026-34593: Ash-hq ash framework uncontrolled resource consumption vulnerability

Ash Hq · Ash Framework

Ash Framework is a declarative, extensible framework for building Elixir applications. Prior to version 3.22.0, Ash.Type.Module.cast_input/2 unconditionally creates a new Erlang atom via Module.concat([value]) for any user-supplied binary string that starts with "Elixir.", before verifying whether the referenced module exists. Because Erlang atoms are never garbage-collected and the BEAM atom table has a hard default limit of approximately 1,048,576 entries, an attacker who can submit values to any resource attribute or argument of type :module can exhaust this table and crash the entire BEAM VM, taking down the application. This issue has been patched in version 3.22.0.

8.2 CVSS 4.0 High EPSS 0.52% · top 58.5% CWE-400 · Uncontrolled resource consumptionCWE-770 · Allocation without limits
8.2CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
24 Jul 2026Last modified by NVD

Description

Ash Framework is a declarative, extensible framework for building Elixir applications. Prior to version 3.22.0, Ash.Type.Module.cast_input/2 unconditionally creates a new Erlang atom via Module.concat([value]) for any user-supplied binary string that starts with "Elixir.", before verifying whether the referenced module exists. Because Erlang atoms are never garbage-collected and the BEAM atom table has a hard default limit of approximately 1,048,576 entries, an attacker who can submit values to any resource attribute or argument of type :module can exhaust this table and crash the entire BEAM VM, taking down the application. This issue has been patched in version 3.22.0.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ash-project/ash/releases/tag/v3.22.0 ProductRelease Notes
https://github.com/ash-project/ash/security/advisories/GHSA-jjf9-w5vj-r6vp ExploitVendor Advisory
https://github.com/ash-project/ash/security/advisories/GHSA-jjf9-w5vj-r6vp ExploitVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-34593), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.