{"answers":{"affected":"3 open source packages ship an affected version, including phoenix_storybook.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8469 exists.","fix":"Upgrade phoenix_storybook to 1.1.0 or later.","what":"CVE-2026-8469 is a high-severity denial of service vulnerability in phenixdigital phoenix_storybook, published on 20 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-8469 and fix it if it is affected.\n\nWhat it is: CVE-2026-8469 is a high-severity denial of service vulnerability in phenixdigital phoenix_storybook, published on 20 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8469 exists.\n\nAffected packages and fixed versions:\n- phoenix_storybook (Hex): affected from 0.2.0; fixed in 1.1.0\n- phoenix_storybook (Hex): affected from 0.2.0; fixed in 1.1.0\n- phoenix_storybook (Hex): affected from 0.2.0; fixed in 1.1.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-8469/ (Markdown: https://insights.sbomify.com/CVE-2026-8469/index.md)","id":"CVE-2026-8469","markdown":"https://insights.sbomify.com/CVE-2026-8469/index.md","name":"CVE-2026-8469","record":{"aliases":["EEF-CVE-2026-8469","GHSA-833p-95jq-929q"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Phoenix Storybook library","requires_auth":"none","summary":"Unauthenticated attackers can crash the BEAM node by exhausting the atom table via unvalidated string-to-atom conversions in phoenix_storybook.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Allocation of Resources Without Limits or Throttling vulnerability in phenixdigital phoenix_storybook allows unauthenticated denial-of-service via BEAM atom table exhaustion.\n\nMultiple 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.\n\nThis issue affects phoenix_storybook from 0.2.0 before 1.1.0.","ecosystems":["Hex"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Unauthenticated denial-of-service via BEAM atom table exhaustion in phoenix_storybook","id":"CVE-2026-8469","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Langflow is affected by weaknesses in secret handling and sensitive configuration access","id":"CVE-2026-8470"},"packages":[{"ecosystem":"Hex","fixed":["1.1.0"],"introduced":["0.2.0"],"last_affected":[],"package":"phoenix_storybook","purl":"pkg:hex/phoenix_storybook","source":"EEF-CVE-2026-8469"},{"ecosystem":"Hex","fixed":["1.1.0"],"introduced":["0.2.0"],"last_affected":[],"package":"phoenix_storybook","purl":null,"source":"GHSA-833p-95jq-929q"},{"ecosystem":"Hex","fixed":["1.1.0"],"introduced":["0.2.0"],"last_affected":[],"package":"phoenix_storybook","purl":"pkg:hex/phoenix_storybook","source":"GHSA-833p-95jq-929q"}],"prev":{"headline":"Unbounded buffer accumulation in multipart header parsing causes denial of service in plug","id":"CVE-2026-8468"},"products":["phoenix_storybook"],"published":"2026-05-20","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-27","vendors":["phenixdigital"]},"summary":"Unauthenticated attackers can crash the BEAM node by exhausting the atom table via unvalidated string-to-atom conversions in phoenix_storybook.","url":"https://insights.sbomify.com/CVE-2026-8469/"}