CVE-2026-108259

HIGH 8.2

Tina: Code injection via unescaped Git branch name in generated client source

CVSS Score

8.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-94
Vendor	tinacms
Product	tinacms
Published	Oct 9, 2026
Last Updated	Oct 9, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

tinacms / tinacms

< 3.0.0

@tinacms / cli

< 3.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/tinacms/tinacms/security/advisories/GHSA-pwhx-cvv3-qj5c github.com: https://github.com/tinacms/tinacms/pull/7526 github.com: https://github.com/tinacms/tinacms/commit/d030d414d39e15de79bf36e4c728d57205e71dde github.com: https://github.com/tinacms/tinacms/releases/tag/@tinacms/[email protected]