Malicious code in xzvbails (npm)
The npm package xzvbails (version 0.0.1) is a malicious fork of the Baileys WhatsApp Web library that injects code to silently subscribe the victim's WhatsApp account to attacker-controlled channels without user consent. This is done by issuing an authenticated FOLLOW query using the victim's own WhatsApp session. The targeted channel JIDs are obfuscated or fetched remotely, allowing dynamic control by the attacker. The malicious code does not steal credentials, maintain persistence, or execute arbitrary code beyond this subscription action.
AI Analysis
Technical Summary
The xzvbails npm package (version 0.0.1) is part of a large family of over 100 near-identical malicious forks of the Baileys WhatsApp Web library. These forks inject a covert channel-subscription action into the WhatsApp socket layer. Upon connection, the injected code sends an authenticated 'w:mex' FOLLOW query using the installer's authenticated WhatsApp session to subscribe the victim's account to attacker-chosen WhatsApp Channel/Newsletter JIDs. The targeted JIDs are hidden via obfuscation methods such as base64 encoding, XOR, or runtime reconstruction, or fetched dynamically from attacker-controlled remote sources. This mechanism abuses the victim's session to increase subscribers for attacker channels but does not exfiltrate credentials, establish persistence, or execute arbitrary remote code.
Potential Impact
Victims unknowingly subscribe to attacker-controlled WhatsApp channels, potentially exposing them to unwanted content or spam. The attack leverages the victim's authenticated session to perform the subscription silently. There is no credential theft, persistence, or arbitrary code execution reported. The impact is limited to unauthorized channel subscriptions.
Mitigation Recommendations
No official patch or remediation is documented for this malicious package. Users should avoid installing or using the xzvbails package (version 0.0.1) and other suspicious forks of the Baileys WhatsApp Web library. Review dependencies carefully to prevent installation of malicious forks. Since this is a client-side package, removing the malicious package and reinstalling a trusted version of Baileys or an official library is recommended.
Malicious code in xzvbails (npm)
Description
The npm package xzvbails (version 0.0.1) is a malicious fork of the Baileys WhatsApp Web library that injects code to silently subscribe the victim's WhatsApp account to attacker-controlled channels without user consent. This is done by issuing an authenticated FOLLOW query using the victim's own WhatsApp session. The targeted channel JIDs are obfuscated or fetched remotely, allowing dynamic control by the attacker. The malicious code does not steal credentials, maintain persistence, or execute arbitrary code beyond this subscription action.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The xzvbails npm package (version 0.0.1) is part of a large family of over 100 near-identical malicious forks of the Baileys WhatsApp Web library. These forks inject a covert channel-subscription action into the WhatsApp socket layer. Upon connection, the injected code sends an authenticated 'w:mex' FOLLOW query using the installer's authenticated WhatsApp session to subscribe the victim's account to attacker-chosen WhatsApp Channel/Newsletter JIDs. The targeted JIDs are hidden via obfuscation methods such as base64 encoding, XOR, or runtime reconstruction, or fetched dynamically from attacker-controlled remote sources. This mechanism abuses the victim's session to increase subscribers for attacker channels but does not exfiltrate credentials, establish persistence, or execute arbitrary remote code.
Potential Impact
Victims unknowingly subscribe to attacker-controlled WhatsApp channels, potentially exposing them to unwanted content or spam. The attack leverages the victim's authenticated session to perform the subscription silently. There is no credential theft, persistence, or arbitrary code execution reported. The impact is limited to unauthorized channel subscriptions.
Mitigation Recommendations
No official patch or remediation is documented for this malicious package. Users should avoid installing or using the xzvbails package (version 0.0.1) and other suspicious forks of the Baileys WhatsApp Web library. Review dependencies carefully to prevent installation of malicious forks. Since this is a client-side package, removing the malicious package and reinstalling a trusted version of Baileys or an official library is recommended.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-17411
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6abd30852a4e24523d340113
Added to database: 09/30/2026, 15:53:41 UTC
Last enriched: 09/30/2026, 15:59:54 UTC
Last updated: 09/30/2026, 22:38:43 UTC
Views: 2
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