---
title: "CVE-2026-108261: TinaCMS - Broken Access Control"
description: "TinaCMS < 3.14.0 and @tinacms/app < 2.5.14 contain a broken access control vulnerability caused by improper origin validation in admin preview routing, letting unauthenticated attackers trick signed-in editors into executing GraphQL operations with their credentials."
url: https://panop.io/threat-heartbeat/CVE-2026-108261/
---

# CVE-2026-108261 TinaCMS - Broken Access Control

TinaCMS < 3.14.0 and @tinacms/app < 2.5.14 contain a broken access control vulnerability caused by improper origin validation in admin preview routing, letting unauthenticated attackers trick signed-in editors into executing GraphQL operations with their credentials.

CVSS base score 9.3 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-108261)

## Details

Type

Broken Access Control

Impact

Information Disclosure, Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-346](https://cwe.mitre.org/data/definitions/346.html)

## Vendor fix

Update to tinacms 3.14.0 and @tinacms/app 2.5.14 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-108261](https://nvd.nist.gov/vuln/detail/CVE-2026-108261)
- [https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7](https://github.com/tinacms/tinacms/security/advisories/GHSA-x34j-47hf-4xg7)
- [https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf](https://github.com/tinacms/tinacms/commit/b57dbf4b56201aef15cd92caa49fd12ab96bbecf)
- [https://github.com/tinacms/tinacms/pull/7522](https://github.com/tinacms/tinacms/pull/7522)
- [https://github.com/tinacms/tinacms/releases/tag/@tinacms/app@2.5.14](https://github.com/tinacms/tinacms/releases/tag/@tinacms/app@2.5.14)
- [https://github.com/tinacms/tinacms/releases/tag/tinacms@3.14.0](https://github.com/tinacms/tinacms/releases/tag/tinacms@3.14.0)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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