{"id":"CVE-2026-54497","state":"PUBLISHED","title":"view_component: Reused Component Instances Retain Stale Render Context","description":"view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 4.0.0 until 4.12.0, ViewComponent::Base instances retain render-scoped objects across calls to render_in; if the same component, collection, or spacer component instance is reused across requests, users, tenants, or threads, later renders can use stale helpers, controller, request, view_flow, format/variant details, and slot child context from an earlier render. This can cause authorization-aware components to render privileged UI for a lower-privileged user, generate links using a stale Host header, leak slot/helper state, and mix request context under concurrent rendering. This issue is fixed in version 4.12.0.","publishedAt":"2026-07-17T20:45:28.338Z","updatedAt":"2026-07-20T13:46:20.930Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["ViewComponent view_component"],"affected":[{"vendor":"ViewComponent","product":"view_component","versions":[{"version":">= 4.0.0, < 4.12.0","status":"affected"}]}],"references":["https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49","https://github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e5334731dd61","https://github.com/ViewComponent/view_component/releases/tag/v4.12.0"],"weaknesses":["CWE-362","CWE-488","CWE-668"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54497.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54497","state":"PUBLISHED","datePublished":"2026-07-17T20:45:28.338Z","dateUpdated":"2026-07-20T13:46:20.930Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T18:01:15.511Z"},"containers":{"cna":{"title":"view_component: Reused Component Instances Retain Stale Render Context","descriptions":[{"lang":"en","value":"view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 4.0.0 until 4.12.0, ViewComponent::Base instances retain render-scoped objects across calls to render_in; if the same component, collection, or spacer component instance is reused across requests, users, tenants, or threads, later renders can use stale helpers, controller, request, view_flow, format/variant details, and slot child context from an earlier render. This can cause authorization-aware components to render privileged UI for a lower-privileged user, generate links using a stale Host header, leak slot/helper state, and mix request context under concurrent rendering. This issue is fixed in version 4.12.0."}],"affected":[{"vendor":"ViewComponent","product":"view_component","versions":[{"version":">= 4.0.0, < 4.12.0","status":"affected"}]}],"references":[{"url":"https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49","name":"https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e5334731dd61","name":"https://github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e5334731dd61","tags":["x_refsource_MISC"]},{"url":"https://github.com/ViewComponent/view_component/releases/tag/v4.12.0","name":"https://github.com/ViewComponent/view_component/releases/tag/v4.12.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-488","lang":"en","description":"CWE-488: Exposure of Data Element to Wrong Session","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-668","lang":"en","description":"CWE-668: Exposure of Resource to Wrong Sphere","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-17T20:45:28.338Z"},"source":{"advisory":"GHSA-9h85-g7w3-rh49","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-20T13:46:16.399609Z","id":"CVE-2026-54497","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-20T13:46:20.930Z"}}]}}}