CVE-2026-8467

{"id": "CVE-2026-8467", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8467", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-05-21T13:57:52.803277Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.5, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "affectedData": [{"cpes": ["cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*"], "repo": "https://github.com/phenixdigital/phoenix_storybook", "vendor": "phenixdigital", "modules": ["Elixir.PhoenixStorybook.Rendering.ComponentRenderer", "Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive", "Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers"], "product": "phoenix_storybook", "versions": [{"status": "affected", "version": "0.5.0", "lessThan": "1.1.0", "versionType": "semver"}], "packageURL": "pkg:hex/phoenix_storybook", "packageName": "phoenix_storybook", "programFiles": ["lib/phoenix_storybook/rendering/component_renderer.ex", "lib/phoenix_storybook/live/story/playground_preview_live.ex", "lib/phoenix_storybook/helpers/extra_assigns_helpers.ex"], "collectionURL": "https://repo.hex.pm", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.PhoenixStorybook.Rendering.ComponentRenderer':attributes_markup/1"}, {"name": "'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handle_event/3"}, {"name": "'Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers':handle_set_variation_assign/3"}]}, {"cpes": ["cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*"], "repo": "https://github.com/phenixdigital/phoenix_storybook", "vendor": "phenixdigital", "modules": ["Elixir.PhoenixStorybook.Rendering.ComponentRenderer", "Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive", "Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers"], "product": "phoenix_storybook", "versions": [{"status": "affected", "version": "e35379dfe2ef1a71b141899e36f431017c55265d", "lessThan": "56ab8464d4375fa52db806148a06cce126ad481d", "versionType": "git"}], "packageURL": "pkg:github/phenixdigital/phoenix_storybook", "packageName": "phenixdigital/phoenix_storybook", "programFiles": ["lib/phoenix_storybook/rendering/component_renderer.ex", "lib/phoenix_storybook/live/story/playground_preview_live.ex", "lib/phoenix_storybook/helpers/extra_assigns_helpers.ex"], "collectionURL": "https://github.com", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.PhoenixStorybook.Rendering.ComponentRenderer':attributes_markup/1"}, {"name": "'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handle_event/3"}, {"name": "'Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers':handle_set_variation_assign/3"}]}]}], "published": "2026-05-20T14:17:04.283", "references": [{"url": "https://cna.erlef.org/cves/CVE-2026-8467.html", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/phenixdigital/phoenix_storybook/commit/56ab8464d4375fa52db806148a06cce126ad481d", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-55hg-8qxv-qj4p", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-8467", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-55hg-8qxv-qj4p", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "description": [{"lang": "en", "value": "CWE-94"}]}], "descriptions": [{"lang": "en", "value": "Code Injection vulnerability in phenixdigital phoenix_storybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation.\n\nThe psb-assign WebSocket event handler in 'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handle_event/3 accepts arbitrary attribute names and values from unauthenticated clients. These values are passed to 'Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers':handle_set_variation_assign/3, which stores them verbatim. When rendering, 'Elixir.PhoenixStorybook.Rendering.ComponentRenderer':attributes_markup/1 interpolates binary attribute values directly into a HEEx template string as name=\"<val>\" without escaping double quotes or HEEx expression delimiters. An attacker can supply a value containing a closing quote followed by a HEEx expression block (e.g. foo\" injected={EXPR} bar=\"), which causes EXPR to be treated as an inline Elixir expression. The resulting template is compiled via EEx.compile_string/2 and executed via Code.eval_quoted_with_env/3 with full Kernel imports and no sandbox, giving the attacker arbitrary code execution on the server.\n\nThis issue affects phoenix_storybook from 0.5.0 before 1.1.0."}, {"lang": "es", "value": "Vulnerabilidad de inyecci\u00f3n de c\u00f3digo en phenixdigital phoenix_storybook permite la ejecuci\u00f3n remota de c\u00f3digo no autenticada a trav\u00e9s de la interpolaci\u00f3n de valores de atributos no saneados en la generaci\u00f3n de plantillas HEEx.\n\nEl gestor de eventos WebSocket psb-assign en 'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handle_event/3 acepta nombres y valores de atributos arbitrarios de clientes no autenticados. Estos valores se pasan a 'Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers':handle_set_variation_assign/3, que los almacena textualmente. Al renderizar, 'Elixir.PhoenixStorybook.Rendering.ComponentRenderer':attributes_markup/1 interpola valores de atributos binarios directamente en una cadena de plantilla HEEx como name=\"<val>\" sin escapar las comillas dobles o los delimitadores de expresi\u00f3n HEEx. Un atacante puede proporcionar un valor que contenga una comilla de cierre seguida de un bloque de expresi\u00f3n HEEx (p. ej., foo\" injected={EXPR} bar=\"), lo que hace que EXPR sea tratado como una expresi\u00f3n Elixir en l\u00ednea. La plantilla resultante se compila a trav\u00e9s de EEx.compile_string/2 y se ejecuta a trav\u00e9s de Code.eval_quoted_with_env/3 con importaciones completas del Kernel y sin sandbox, lo que le da al atacante ejecuci\u00f3n de c\u00f3digo arbitrario en el servidor.\n\nEste problema afecta a phoenix_storybook desde 0.5.0 antes de 1.1.0."}], "lastModified": "2026-07-23T12:10:00.110", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}