CVE-2026-108261
9.3 CRITICALpublic exploit availablePublished 2026-10-09 · Updated 2026-10-13
AI risk analysis
- Summary
- A vulnerability in Tina CMS allows unauthenticated attackers to craft malicious links that trick signed-in editors into loading attacker-controlled content in admin preview frames, enabling the attacker to execute GraphQL operations with the editor's credentials and access or modify protected content.
- Exploitability
- Easy to exploit with no prerequisites; attackers simply need to send a crafted link to a signed-in editor who will click it and load the malicious iframe in the admin preview area.
- Blast radius
- High impact across all Tina CMS installations using affected versions, potentially exposing sensitive content or allowing unauthorized modifications to protected data.
- Detection
- No reliable host or network indicator is derivable from the published description.
- Prioritized remediation
- Upgrade to tinacms 3.14.0 and @tinacms/app 2.5.14 immediately.
Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.
NVD description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Weaknesses
CWE-346, CWE-441, CWE-601
Public exploit & PoC references
- https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf
- https://github.com/tinacms/tinacms/pull/7522
- https://github.com/tinacms/tinacms/releases/tag/@tinacms/[email protected]
- https://github.com/tinacms/tinacms/releases/tag/[email protected]
- https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7
- https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7
All references
- https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf
- https://github.com/tinacms/tinacms/pull/7522
- https://github.com/tinacms/tinacms/releases/tag/@tinacms/[email protected]
- https://github.com/tinacms/tinacms/releases/tag/[email protected]
- https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7
- https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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