🛡️ MAL-2026-5424 — obus-core

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in @oplus/obus-core (npm)

Source: amazon-inspector

On npm install, scripts/postinstall.js collects the installer's username (os.userInfo()), hostname (os.hostname()), current working directory (process.cwd()), and public IP (fetched from https://api.ipify.org), then ships this data to a hardcoded interactsh callback at xjaipnfhcpawuhzlgzkzo1ak3aai9m873.oast.fun through two channels: (1) a DNS lookup whose label is the hex-encoded payload prefixed onto the C2 domain, and (2) an HTTPS GET to /poc with the JSON payload base64-encoded in an x-poc header. The package is published at version 99.99.99 under the @oplus scope (mirroring OPlus/Oppo internal naming) — the textbook dependency-confusion shape designed to outrank an internal counterpart during resolution. A source comment self-labels the package as a 'Dependency Confusion PoC - Bug Bounty Research', but the exfiltration fires on every install regardless of stated intent: any developer or build system that resolves this package leaks host identifiers to the attacker-controlled callback domain.

Affected software

MAL-2026-5424 is recorded against 1 package.

  • @oplus/obus-core

Timeline and source

Published on 9 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-06-09
Updated 2026-08-12
Modified 2026-06-09
Fix URL N/A

Affected Packages

Software From version Fixed in
@oplus/obus-core — —

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