Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-8469.html
- https://github.com/phenixdigital/phoenix_storybook/commit/96d524690af0fe197a49f6
- https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-833p
- https://osv.dev/vulnerability/EEF-CVE-2026-8469
- https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-833p
FAQ
What is CVE-2026-8469?
CVE-2026-8469 is a documented vulnerability. 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 ...
How severe is CVE-2026-8469?
CVSS scoring is not yet available for CVE-2026-8469. Check NVD for updates.
Is there a patch for CVE-2026-8469?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.