MalwarePublished 7 Aug 2026

beaver-ui-popover-marker (npm) · Malicious Code

Affects beaver-ui-popover-markerSource GCVE Database

Malicious package : remove beaver-ui-popover-marker and rotate any secrets on hosts that installed it.

Data as of 7 Aug 2026, 15:33 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-13523

What to do

Remove beaver-ui-popover-marker 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
npmbeaver-ui-popover-marker	Affected =35.5.8	Fixed in–

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Description

The npm package beaver-ui-popover-marker version 35.5.8 contains malicious code that executes upon requiring the package. It downloads and runs a platform-specific binary from obfuscated Cloudflare Workers hosts, writing it as a hidden file in temporary directories and executing it detached from the main process. The package masquerades as a React UI component but performs unauthorized native code execution, posing a severe risk to any system that installs or requires it.

Impact

This malicious package grants full host code execution on any machine that installs or requires it, enabling an attacker to run arbitrary native code with the privileges of the user running the Node.js process. This can lead to complete system compromise, data theft, persistence, and further malicious activities.

Defensive guidance

Users should immediately avoid installing or requiring version 35.5.8 of beaver-ui-popover-marker. Remove the package from all environments and replace it with a trusted alternative. Monitor for any suspicious activity related to this package.

Summary

The beaver-ui-popover-marker npm package (version 35.5.8) includes malicious functionality triggered during the require() call. It loads a script that cycles through obfuscated Cloudflare Workers endpoints to download a platform-specific binary, which it writes to a hidden file in the system's temporary directory with a decoy name. The binary is then made executable and spawned detached via shell commands. If HTTPS fetches fail, a DNS TXT record fallback reconstructs a base64-encoded payload. The package pretends to be a React UI popover component but has no legitimate reason to fetch and execute native binaries, resulting in full host code execution on any machine that uses this package.

References

npmjs.com/package/beaver-ui-popover-marker/v/35.5.8 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 7 Aug 2026, 15:33 UTC

Technical details

References

Community reviews