{
    "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": "2026-05-27T15:40:55.927Z"
    },
    "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 Männchen / EEF"
                }
            ],
            "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": "2026-05-27T15:40:55.927Z"
            },
            "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"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-833p-95jq-929q",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-21T13:55:42.783019Z",
                                "id": "CVE-2026-8469",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-05-21T13:56:33.631Z"
                }
            }
        ]
    }
}