CVE-2026-29066: Arbitrary File Read via Disabled Vite Filesystem Restriction in TinaCMS CLI

Severity: medium (CVSS 6.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-12 · updated 2026-06-17
Weakness: CWE-200

Description

Tina is a headless content management system. Prior to 2.1.8, the TinaCMS CLI dev server configures Vite with server.fs.strict: false, which disables Vite's built-in filesystem access restriction. This allows any unauthenticated attacker who can reach the dev server to read arbitrary files on the host system. This vulnerability is fixed in 2.1.8.

Affected products

tinacms: before 2.1.8 — fixed in 2.1.8

How to fix

Upgrade to a fixed version: tinacms 2.1.8. Check the vendor advisory for mitigations.

References

https://github.com/tinacms/tinacms/security/advisories/GHSA-m48g-4wr2-j2h6
https://github.com/tinacms/tinacms/security/advisories/GHSA-m48g-4wr2-j2h6

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