{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8469", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-05-13T11:44:43.316Z", "datePublished": "2026-05-20T13:35:27.914Z", "dateUpdated": "2026-05-20T13:35:27.914Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["Elixir.PhoenixStorybook.ExtraAssignsHelpers", "Elixir.PhoenixStorybook.Story.Playground"], "packageName": "phoenix_storybook", "packageURL": "pkg:hex/phoenix_storybook", "product": "phoenix_storybook", "programFiles": ["lib/phoenix_storybook/helpers/extra_assigns_helpers.ex", "lib/phx_live_storybook/live/entry_live.ex"], "programRoutines": [{"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_set_variation_assign/3"}, {"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_toggle_variation_assign/3"}, {"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_variation_id/2"}, {"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_value/4"}], "repo": "https://github.com/phenixdigital/phoenix_storybook", "vendor": "phenixdigital", "versions": [{"lessThan": "1.1.0", "status": "affected", "version": "0.2.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["Elixir.PhoenixStorybook.ExtraAssignsHelpers", "Elixir.PhoenixStorybook.Story.Playground"], "packageName": "phenixdigital/phoenix_storybook", "packageURL": "pkg:github/phenixdigital/phoenix_storybook", "product": "phoenix_storybook", "programFiles": ["lib/phoenix_storybook/helpers/extra_assigns_helpers.ex", "lib/phx_live_storybook/live/entry_live.ex"], "programRoutines": [{"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_set_variation_assign/3"}, {"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_toggle_variation_assign/3"}, {"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_variation_id/2"}, {"name": "'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_value/4"}], "repo": "https://github.com/phenixdigital/phoenix_storybook", "vendor": "phenixdigital", "versions": [{"lessThan": "96d524690af0fe197a49f60d18e564a620b9ef81", "status": "affected", "version": "0228669d55c23a754d1ef11f49a32121129d5395", "versionType": "git"}]}], "configurations": [{"lang": "en", "value": "Phoenix Storybook must be mounted on a network-reachable route."}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.1.0", "versionStartIncluding": "0.2.0", "vulnerable": true}], "operator": "OR"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Peter Ullrich"}, {"lang": "en", "type": "remediation developer", "value": "Christian Blavier"}, {"lang": "en", "type": "analyst", "value": "Jonatan M\u00e4nnchen"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Allocation of Resources Without Limits or Throttling vulnerability in phenixdigital phoenix_storybook allows unauthenticated denial-of-service via BEAM atom table exhaustion.</p><p>Multiple LiveView event handlers convert user-supplied event parameter strings to atoms using <tt>String.to_atom/1</tt> without validation: <tt>'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_set_variation_assign/3</tt> interns every key of the <tt>psb-assign</tt> params map; <tt>'Elixir.PhoenixStorybook.ExtraAssignsHelpers':handle_toggle_variation_assign/3</tt> interns the <tt>\"attr\"</tt> value from <tt>psb-toggle</tt> events; <tt>'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_variation_id/2</tt> interns elements of <tt>\"variation_id\"</tt>; and <tt>'Elixir.PhoenixStorybook.ExtraAssignsHelpers':to_value/4</tt> interns raw string values for attributes declared as <tt>:atom</tt> or <tt>:boolean</tt>. 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.</p><p>This issue affects phoenix_storybook from 0.2.0 before 1.1.0.</p>"}], "value": "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."}], "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}], "metrics": [{"cvssV4_0": {"attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 8.2, "baseSeverity": "HIGH", "privilegesRequired": "NONE", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "vectorString": "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", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "description": "CWE-770 Allocation of Resources Without Limits or Throttling", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-05-20T13:35:27.914Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-833p-95jq-929q"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-8469.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-8469"}, {"tags": ["patch"], "url": "https://github.com/phenixdigital/phoenix_storybook/commit/96d524690af0fe197a49f60d18e564a620b9ef81"}], "source": {"discovery": "EXTERNAL"}, "title": "Unauthenticated denial-of-service via BEAM atom table exhaustion in phoenix_storybook", "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-8469", "lastModified": "2026-05-20T14:23:14.993", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}, "published": "2026-05-20T14:17:04.447", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-8469.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/phenixdigital/phoenix_storybook/commit/96d524690af0fe197a49f60d18e564a620b9ef81"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-833p-95jq-929q"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-8469"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}