Tina: Code injection via unescaped Git branch name in generated client source — GHSA-PWHX-CVV3-QJ5C

Summary

### Summary `@tinacms/cli` inserts the raw Git branch value into the generated `client.ts` source without escaping or encoding. A Git-valid branch name can close the string literal and inject an arbitrary JavaScript expression that executes when the consumer build imports the generated client module. ### Affected component - **Source (branch read):** `packages/@tinacms/cli/src/cmds/init/templates/config.ts` lines…

Timeline

Published by source

2026-10-09

Risk context

• Reported severity or threat level: high.
• Reported CVSS score: 8.2 out of 10.
• Review exposure for the affected product or family: npm: @tinacms/cli.

Product

npm: @tinacms/cli

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-PWHX-CVV3-QJ5C

Source

GitHub

Vendor

GitHub

Published by source

2026-10-09

Last source activity

2026-10-09

Additional identifiers

CVE-2026-108259

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.