GCVE-110-OSM-2026-3123

Advisory PublishedCVSS 5.4/10

Vulnetix · Advisory published April 24, 2026

Exfiltrates environment variables (SUDO_USER, APPDATA) and .env file contents to attacker-controlled domain yikoulian.cc at require-time. Poses as an AI developer setup utility targeting Claude Code and Codex users ('怡口莲 AI 一键安装配置工具 - 支持 Claude Code 和 Codex'). Shares Bun.file(package/1)+Bun.file(package/2) builder fingerprint with the chai-as-elevated DeceptiveDevelopment campaign. **Trigger**: executes at require-time (no install hook — fires when the module is imported). **Collection**: reads environment variables — `SUDO_USER`, `APPDATA`. **File access**: reads `.env`. **Encoding**: payload is JSON-serialized before transmission. **Exfiltration**: sends collected data to `https://yikoulian.cc`. **Builder fingerprint**: `Bun.file(package/1)` + `Bun.file(package/2)` — shared with chai-as-elevated, chai-as-char, chai-use-chain (DeceptiveDevelopment cluster).

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

5.4/10

Medium · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Affected Products

Vendor	Product	Versions	Platforms
unknown	yikoulian-config	1.2.2 (affected)	—

References

Malicious npm package: yikoulian-config

advisory

vendor

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