CVE-2026-108261

{"id": "CVE-2026-108261", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-108261", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-13T11:22:22.126132Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.3, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "tinacms", "product": "tinacms", "versions": [{"status": "affected", "version": "< 3.14.0"}]}, {"vendor": "@tinacms", "product": "app", "versions": [{"status": "affected", "version": "< 2.5.14"}]}]}], "published": "2026-10-09T21:17:04.347", "references": [{"url": "https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf", "source": "security-advisories@github.com"}, {"url": "https://github.com/tinacms/tinacms/pull/7522", "source": "security-advisories@github.com"}, {"url": "https://github.com/tinacms/tinacms/releases/tag/@tinacms/app@2.5.14", "source": "security-advisories@github.com"}, {"url": "https://github.com/tinacms/tinacms/releases/tag/tinacms@3.14.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7", "source": "security-advisories@github.com"}, {"url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-346"}, {"lang": "en", "value": "CWE-441"}, {"lang": "en", "value": "CWE-601"}]}], "descriptions": [{"lang": "en", "value": "Tina is a headless content management system. Prior to tinacms 3.14.0 and @tinacms/app 2.5.14, the /~/* admin preview route in packages/tinacms/src/admin/index.tsx can turn an attacker-controlled hash-router splat into an off-origin iframe URL through packages/@tinacms/app/src/preview.tsx, while packages/@tinacms/app/src/lib/preview-origin.ts derives expectedOrigin from that same URL for the GraphQL message channel in packages/@tinacms/app/src/lib/graphql-reducer.ts. An unauthenticated attacker can send a crafted link to a signed-in editor, cause the admin to frame an attacker origin, and have that frame treated as the trusted preview. The attacker-controlled frame can submit GraphQL reads or mutations that the admin executes with the editor credentials, exposing or modifying protected content. This issue is fixed in tinacms 3.14.0 and @tinacms/app 2.5.14."}], "lastModified": "2026-10-16T20:04:29.760", "sourceIdentifier": "security-advisories@github.com"}