---
id: MAL-2026-2947
title: Malicious code in moonbit-schema-utils (PyPI)
summary: Malicious code in moonbit-schema-utils (PyPI)
severity: none
vendor: moonbit-schema-utils
product: moonbit-schema-utils
ecosystem: pip
affected:
  - moonbit-schema-utils
published: '2026-04-20'
updated: '2026-07-09'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/MAL-2026-2947'
references:
  - url: >-
      https://github.com/zongen01/wechat-editor-studio/pull/2/changes#diff-d9555f91ec2cf16d2b3d23115fe3cf6600fa8b42627de82a81da48191c54d99c
  - url: 'https://bad-packages.kam193.eu/pypi/package/moonbit-schema-utils'
  - url: >-
      https://github.com/DiamondFrontline/wechat-editor-studio/commit/3c61484843fbc7fbeb5e81149296aa7843570ee1
tags:
  - osv
  - pip
ingestedAt: '2026-07-09T11:56:19.177Z'
---

## Overview


---
_-= Per source details. Do not edit below this line.=-_

## Source: kam193 (5fd7cc9fd6247802480f37b02a23faadb37c7fa5aded77358015c0861ab980e7)
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.


---

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


## Affected packages

- `moonbit-schema-utils`

## Remediation

Refer to the advisory for the patched release.