CVE-2026-108259

High

Description

Tina is a headless content management system. Prior to 3.0.0, @tinacms/cli reads Git branch values from VERCEL_GIT_COMMIT_REF, GITHUB_BRANCH, or HEAD, incorporates the raw value into the API URL, and interpolates that URL into JavaScript string literals in packages/@tinacms/cli/src/next/codegen/index.ts and packages/@tinacms/cli/src/next/codegen/codegen/plugin.ts. A crafted Git-valid branch name containing a quote can terminate the generated string and inject an expression that executes when the generated client module is imported during a preview build. The injected code runs with the build process privileges and can read environment credentials, modify deployment artifacts, or make network requests. This issue is fixed in version 3.0.0.

SeverityHigh

CVSS8.2

Exploit probability—

Product@tinacms/cli

PublishedOct 9, 2026

First seenOct 9, 2026

Weakness typeCWE-94Code injection

How to fix

Update

@tinacms/cli3.0.0 or later

Affected products

Product	Affected versions	Fixed in
@tinacms/clinpm	v < 3.0.0	3.0.0

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