Malicious code in vite-plugin-compress-js (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7f7b2710441863a429a2a1833e06f54e9afc23c87d1b40d7ee09e1995c6a65c2) On module load, this Vite plugin performs an HTTP GET to https://www.jsonkeeper.com/b/XVHGD (an anonymous, mutable paste host) and passes the response's `data` field to `new Function.constructor("require",...)`, then invokes the resulting function with `require` — granting the remote payload full Node.js capabilities (fs, child_process, network) inside the consumer's Vite build process. dist/index.mjs (lines ~124-128) calls the fetch+eval directly via initPlugin(); dist/index.cjs (lines ~130-141) wraps the same payload in `if (isMainThread) { new Worker(__filename) } else { initPlugin() }`, spawning a worker that re-loads the module with isMainThread=false and executes the network-fetched code in the worker thread to obscure the behavior from naive inspection. The package name and metadata (author 'Vben', debug name 'vite-plugin-compression', plugin name 'vite:compression') clone the well-known vite-plugin-compress / vite-plugin-compression packages, and an otherwise-unused `request` dependency exists solely to perform the C2 fetch. Any developer or build system that imports this package executes whatever JavaScript the operator currently has hosted at the jsonkeeper paste. ## Source: ghsa-malware (7989787bb752866c34bd055adeb5327f5b2f049101dc927be3ba9fa7a20bacc8) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
AI Analysis
Technical Summary
The vite-plugin-compress-js package, specifically versions 0.5.5 through 0.5.7, performs an HTTP GET request to a mutable anonymous paste host to retrieve JavaScript code, which it then executes using the Function constructor with Node.js require access. This execution happens during the Vite build process, allowing the remote payload full access to Node.js APIs such as filesystem, child processes, and network. The malicious code is executed inside a worker thread to obscure its behavior. The package impersonates legitimate Vite compression plugins and includes an unused 'request' dependency solely for fetching the command-and-control payload. This results in complete compromise of any system using this package.
Potential Impact
Systems that have installed or run vite-plugin-compress-js versions 0.5.5, 0.5.6, or 0.5.7 are fully compromised, as the package executes arbitrary remote code with full Node.js privileges. This can lead to unauthorized access, data exfiltration, execution of arbitrary commands, and persistence of malicious software. All secrets and keys stored on the affected system should be considered exposed and require immediate rotation.
Mitigation Recommendations
There is no official patch or fix available for this malicious package. Immediate removal of vite-plugin-compress-js versions 0.5.5, 0.5.6, and 0.5.7 from all systems is required. Because the package grants full control to an attacker, assume full system compromise and rotate all secrets and keys from a separate, trusted environment. Monitor for any signs of persistent malicious activity and rebuild affected systems if necessary.
Malicious code in vite-plugin-compress-js (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7f7b2710441863a429a2a1833e06f54e9afc23c87d1b40d7ee09e1995c6a65c2) On module load, this Vite plugin performs an HTTP GET to https://www.jsonkeeper.com/b/XVHGD (an anonymous, mutable paste host) and passes the response's `data` field to `new Function.constructor("require",...)`, then invokes the resulting function with `require` — granting the remote payload full Node.js capabilities (fs, child_process, network) inside the consumer's Vite build process. dist/index.mjs (lines ~124-128) calls the fetch+eval directly via initPlugin(); dist/index.cjs (lines ~130-141) wraps the same payload in `if (isMainThread) { new Worker(__filename) } else { initPlugin() }`, spawning a worker that re-loads the module with isMainThread=false and executes the network-fetched code in the worker thread to obscure the behavior from naive inspection. The package name and metadata (author 'Vben', debug name 'vite-plugin-compression', plugin name 'vite:compression') clone the well-known vite-plugin-compress / vite-plugin-compression packages, and an otherwise-unused `request` dependency exists solely to perform the C2 fetch. Any developer or build system that imports this package executes whatever JavaScript the operator currently has hosted at the jsonkeeper paste. ## Source: ghsa-malware (7989787bb752866c34bd055adeb5327f5b2f049101dc927be3ba9fa7a20bacc8) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vite-plugin-compress-js package, specifically versions 0.5.5 through 0.5.7, performs an HTTP GET request to a mutable anonymous paste host to retrieve JavaScript code, which it then executes using the Function constructor with Node.js require access. This execution happens during the Vite build process, allowing the remote payload full access to Node.js APIs such as filesystem, child processes, and network. The malicious code is executed inside a worker thread to obscure its behavior. The package impersonates legitimate Vite compression plugins and includes an unused 'request' dependency solely for fetching the command-and-control payload. This results in complete compromise of any system using this package.
Potential Impact
Systems that have installed or run vite-plugin-compress-js versions 0.5.5, 0.5.6, or 0.5.7 are fully compromised, as the package executes arbitrary remote code with full Node.js privileges. This can lead to unauthorized access, data exfiltration, execution of arbitrary commands, and persistence of malicious software. All secrets and keys stored on the affected system should be considered exposed and require immediate rotation.
Mitigation Recommendations
There is no official patch or fix available for this malicious package. Immediate removal of vite-plugin-compress-js versions 0.5.5, 0.5.6, and 0.5.7 from all systems is required. Because the package grants full control to an attacker, assume full system compromise and rotate all secrets and keys from a separate, trusted environment. Monitor for any signs of persistent malicious activity and rebuild affected systems if necessary.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-5713
- Osv Schema Version
- 1.7.4
- Aliases
- ["GHSA-jc9j-qfjm-7m7f"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a4c340d27e9c797195f717e
Added to database: 07/06/2026, 23:02:37 UTC
Last enriched: 07/06/2026, 23:17:01 UTC
Last updated: 07/30/2026, 12:34:19 UTC
Views: 7
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