{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8467", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-05-13T11:44:40.790Z", "datePublished": "2026-05-20T13:35:29.018Z", "dateUpdated": "2026-05-27T15:41:02.357Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["Elixir.PhoenixStorybook.Rendering.ComponentRenderer", "Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive", "Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers"], "packageName": "phoenix_storybook", "packageURL": "pkg:hex/phoenix_storybook", "product": "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"], "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"}], "repo": "https://github.com/phenixdigital/phoenix_storybook", "vendor": "phenixdigital", "versions": [{"lessThan": "1.1.0", "status": "affected", "version": "0.5.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["Elixir.PhoenixStorybook.Rendering.ComponentRenderer", "Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive", "Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers"], "packageName": "phenixdigital/phoenix_storybook", "packageURL": "pkg:github/phenixdigital/phoenix_storybook", "product": "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"], "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"}], "repo": "https://github.com/phenixdigital/phoenix_storybook", "vendor": "phenixdigital", "versions": [{"lessThan": "56ab8464d4375fa52db806148a06cce126ad481d", "status": "affected", "version": "e35379dfe2ef1a71b141899e36f431017c55265d", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.1.0", "versionStartIncluding": "0.5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Nick Mykhailyshyn"}, {"lang": "en", "type": "analyst", "value": "Cenk K\u00fcc\u00fck"}, {"lang": "en", "type": "remediation developer", "value": "Christian Blavier"}, {"lang": "en", "type": "analyst", "value": "Jonatan M\u00e4nnchen / EEF"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Code Injection vulnerability in phenixdigital phoenix_storybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation.</p><p>The <tt>psb-assign</tt> WebSocket event handler in <tt>'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handle_event/3</tt> accepts arbitrary attribute names and values from unauthenticated clients. 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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. 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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."}], "id": "CVE-2026-8467", "lastModified": "2026-06-17T11:03:57.860", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.5, "baseSeverity": "CRITICAL", "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": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8467", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-21T13:57:52.803277Z", "version": "2.0.3"}}]}, "published": "2026-05-20T14:17:04.283", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-55hg-8qxv-qj4p"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.5.0,1.1.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "phoenix_storybook", "source": "cna", "vendor": "phenixdigital"}, "product": "phoenix_storybook", "vendor": "phenixdigital"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e35379dfe2ef1a71b141899e36f431017c55265d,56ab8464d4375fa52db806148a06cce126ad481d)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "phoenix_storybook", "source": "cna", "vendor": "phenixdigital"}, "product": "phoenix_storybook", "vendor": "phenixdigital"}], "created": "2026-05-20T15:30:33.489569+00:00", "updated": "2026-05-21T08:19:15.849407+00:00", "vendors": ["phenixdigital", "phenixdigital$PRODUCT$phoenix_storybook"]}