CVE-2026-34593
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk35th percentile - higher than 35% of all known CVEs
Summary
Ash Framework before version 3.22.0 in Ash.Type.Module.cast_input/2 unconditionally creates a new Erlang atom via Module.concat([value]) for any user-supplied binary string starting with "Elixir.", without verifying whether the module exists. Erlang atoms are never garbage-collected and the BEAM atom table has a hard default limit of approximately 1,048,576 entries.
Risk Assessment
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, causing application downtime.
Recommendation
Immediately upgrade Ash Framework to version 3.22.0, which fixes this vulnerability.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS