MalwarePublished 5 Aug 2026

devplatform-vite-plugin-external (npm) · Malicious Code

Affects devplatform-vite-plugin-externalSource GCVE Database

Malicious package : remove devplatform-vite-plugin-external and rotate any secrets on hosts that installed it.

Data as of 6 Aug 2026, 18:24 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-13272

What to do

Remove devplatform-vite-plugin-external from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmdevplatform-vite-plugin-external	Affected =35.3.6	Fixed in–

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Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7a591855b5f44a53d20e6258728aeb5c0254fb10dac285f579fffcfc97608061) The package's main entry (index.js) unconditionally requires./setup on load. setup.js selects an OS/arch-specific endpoint and downloads a binary from a rotating list of Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) whose hostnames are assembled via array-join string splitting to evade static analysis, with a DNS-TXT chunked fallback across sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to a temp path under a disguised name ('dotnet_diag_<tag>.exe' on Windows or '.cache_<tag>' on POSIX), chmod 0755, and spawned detached via cmd.exe /c start /b or /bin/sh -c "fp &". There is no hash or signature verification of the downloaded payload; the source hosts are attacker-controlled infrastructure unrelated to the package's stated Vite-plugin purpose. Execution is suppressed by DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK environment variables and cached via a marker file with a ~21329s TTL, framing the behavior as telemetry while dropping and running an opaque binary. Any consumer that requires or imports this package triggers full-host code execution under attacker control. ## Source: ghsa-malware (8c85582964f88194107914cd82214c07879ac0ae310f6fd7af6c885b30145a71) 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.

Impact

Any consumer that imports or requires devplatform-vite-plugin-external version 35.3.6 will trigger the download and execution of an attacker-controlled binary, resulting in full-host code execution under the attacker's control. This can lead to complete compromise of the affected system. The malicious payload is delivered without integrity verification, increasing the risk of undetected compromise. The attack is disguised as telemetry activity and attempts to evade detection by suppressing execution logs and caching behavior.

Defensive guidance

Users should immediately remove and avoid using devplatform-vite-plugin-external version 35.3.6. Verify all dependencies and replace this package with a trusted alternative. Monitor for any signs of compromise if this package was previously used.

Summary

The devplatform-vite-plugin-external package version 35.3.6 includes malicious functionality in its main entry (index.js), which unconditionally requires a setup.js script. This script dynamically constructs hostnames to evade static detection and downloads a binary payload from attacker-controlled Cloudflare Workers endpoints and fallback domains. The binary is saved to a temporary path with a disguised filename, given executable permissions, and executed detached from the main process. No integrity checks such as hash or signature verification are performed on the downloaded payload. Execution is suppressed by environment variables related to telemetry opt-out and cached with a marker file to avoid repeated downloads within a TTL of approximately 21329 seconds. This results in arbitrary code execution on any system that imports or requires this package.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 22:01 UTC

Technical details

References

Community reviews