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The vulnerability stems from unfiltered environment variable exposure in the TinaCMS CLI's server setup. The patch in #3584 specifically implemented a whitelist (NEXT_PUBLIC_* and TINA_PUBLIC_*), indicating previous versions lacked this filtering. The CLI's server initialization code would have contained the vulnerable environment variable handling logic, likely in the server setup/configuration files. While exact function names aren't visible in provided references, the pattern of environment variable handling in server middleware/configuration files matches typical implementations for this type of vulnerability.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| @tinacms/cli | npm | >= 1.0.0, < 1.0.9 | 1.0.9 |
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