Malicious code in fabric-render-bridge (npm)
The npm package fabric-render-bridge (version 1.0.0) contains malicious code that executes automatically upon installation. Instead of providing rendering functionality, it steals Minecraft launcher credentials and system information, sending them to a hardcoded Discord webhook. This behavior occurs during the post-install script execution, compromising user credentials and host identity.
AI Analysis
Technical Summary
The fabric-render-bridge npm package version 1.0.0 declares a postinstall script that runs index.js automatically upon installation. This script reads credential stores from multiple Minecraft launchers (including official launcher, PrismLauncher, MultiMC, TLauncher, Modrinth, PolyMC, GDLauncher) and extracts accessToken, refreshToken, and usernames. It also collects session dumps from the OS temp directory and system information such as hostname, username, platform, and OS release. All this data is exfiltrated via HTTPS POST requests to a hardcoded Discord webhook URL. The package does not provide any legitimate rendering functionality and solely acts as a credential and host identity stealer.
Potential Impact
Users who install fabric-render-bridge version 1.0.0 risk having their Minecraft launcher credentials and session tokens stolen, potentially allowing unauthorized access to their Minecraft accounts. Additionally, system information is leaked, which could aid attackers in further targeting or profiling victims. This compromises user privacy and account security.
Mitigation Recommendations
No official patch or remediation is indicated. Users should avoid installing the fabric-render-bridge package version 1.0.0. If already installed, remove the package immediately and change Minecraft account credentials and any other accounts that may be affected. Monitor for unauthorized access and consider revoking tokens or sessions where possible.
Malicious code in fabric-render-bridge (npm)
Description
The npm package fabric-render-bridge (version 1.0.0) contains malicious code that executes automatically upon installation. Instead of providing rendering functionality, it steals Minecraft launcher credentials and system information, sending them to a hardcoded Discord webhook. This behavior occurs during the post-install script execution, compromising user credentials and host identity.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The fabric-render-bridge npm package version 1.0.0 declares a postinstall script that runs index.js automatically upon installation. This script reads credential stores from multiple Minecraft launchers (including official launcher, PrismLauncher, MultiMC, TLauncher, Modrinth, PolyMC, GDLauncher) and extracts accessToken, refreshToken, and usernames. It also collects session dumps from the OS temp directory and system information such as hostname, username, platform, and OS release. All this data is exfiltrated via HTTPS POST requests to a hardcoded Discord webhook URL. The package does not provide any legitimate rendering functionality and solely acts as a credential and host identity stealer.
Potential Impact
Users who install fabric-render-bridge version 1.0.0 risk having their Minecraft launcher credentials and session tokens stolen, potentially allowing unauthorized access to their Minecraft accounts. Additionally, system information is leaked, which could aid attackers in further targeting or profiling victims. This compromises user privacy and account security.
Mitigation Recommendations
No official patch or remediation is indicated. Users should avoid installing the fabric-render-bridge package version 1.0.0. If already installed, remove the package immediately and change Minecraft account credentials and any other accounts that may be affected. Monitor for unauthorized access and consider revoking tokens or sessions where possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-17225
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6abb41abf7a7c54106cc3a56
Added to database: 09/29/2026, 04:42:19 UTC
Last enriched: 09/29/2026, 05:00:10 UTC
Last updated: 09/29/2026, 18:00:01 UTC
Views: 14
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