FKIE_CVE-2026-108261

Vulnerability from fkie_nvd - Published: 2026-10-09 21:17 - Updated: 2026-10-09 21:17
Severity
9.3 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf
security-advisories@github.comhttps://github.com/tinacms/tinacms/pull/7522
security-advisories@github.comhttps://github.com/tinacms/tinacms/releases/tag/@tinacms/app@2.5.14
security-advisories@github.comhttps://github.com/tinacms/tinacms/releases/tag/tinacms@3.14.0
security-advisories@github.comhttps://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "tinacms",
          "vendor": "tinacms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.14.0"
            }
          ]
        },
        {
          "product": "app",
          "vendor": "@tinacms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.5.14"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-108261",
  "lastModified": "2026-10-09T21:17:04.347",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.8,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-09T21:17:04.347",
  "references": [
    {
      "source": "security-advisories@github.com",
      "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"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-346"
        },
        {
          "lang": "en",
          "value": "CWE-441"
        },
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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