moonbit-locale-compat

Details

**Severity:** Critical

**Affected versions:** `= 0.2.1`

## Source: kam193 (d42bb32adb1fb5f388368b9e4ab382bfbc8cd7f62dab4c70a8563a448ce9c2af)
Campaign includes a chain of dependencies that finally exfiltrate sensitive environment variables to a hardcoded GitHub repository as exfiltration target, and in specific environments also start a reverse shell. It appears to be targeting specifically one GitHub project, where the front-end package was included in a PR.


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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.


Campaign: 2026-04-moonbit-locale-compat


Reasons (based on the campaign):


 - The malicious code is intentionally included in a dependency of the package


 - The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.


 - exfiltration-env-variables

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/moonbit-locale-compat/MAL-2026-2945.json))

**References:**
- https://github.com/zongen01/wechat-editor-studio/pull/2/changes#diff-d9555f91ec2cf16d2b3d23115fe3cf6600fa8b42627de82a81da48191c54d99c
- https://github.com/DiamondFrontline/wechat-editor-studio/commit/3c61484843fbc7fbeb5e81149296aa7843570ee1
- https://bad-packages.kam193.eu/pypi/package/moonbit-locale-compat
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/moonbit-locale-compat/MAL-2026-2945.json
- https://github.com/advisories/GHSA-pqwp-q393-g3wx

Compromised versions (1)

• = 0.2.1

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.