Allocation of Resources Without Limits or Throttling vulnerability in phenixdigital phoenix_storybook allows unauthenticated denial-of-service via BEAM atom table exhaustion.
Multiple LiveView event handlers convert user-supplied event parameter strings to atoms using String.to_atom/1 without validation: 'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_set_variation_assign/3 interns every key of the psb-assign params map; 'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_toggle_variation_assign/3 interns the "attr" value from psb-toggle events; 'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_variation_id/2 interns elements of "variation_id"; and 'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_value/4 interns raw string values for attributes declared as :atom or :boolean. BEAM atoms are never garbage-collected, so each unique attacker-controlled string is a permanent allocation. Once the atom table ceiling (~1,048,576 atoms) is reached, the entire BEAM node aborts, taking down all applications running on it.
This issue affects phoenix_storybook from 0.2.0 before 1.1.0.
CVSS
No CVSS.
References
Configurations
No configuration.
History
21 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-833p-95jq-929q - |
20 May 2026, 14:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-20 14:17
Updated : 2026-05-21 15:16
NVD link : CVE-2026-8469
Mitre link : CVE-2026-8469
CVE.ORG link : CVE-2026-8469
JSON object : View
Products Affected
No product.
CWE
CWE-770
Allocation of Resources Without Limits or Throttling