cobrowsing-test-utils (npm) · Malicious Code
Affects cobrowsing-test-utilsSource GCVE Database
Malicious package : remove cobrowsing-test-utils and rotate any secrets on hosts that installed it.
Data as of 5 Aug 2026, 16:22 UTC
Malicious package
Published to npm · OSV MAL-2026-12658
What to do
Remove cobrowsing-test-utils 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 |
|---|---|---|
| npmcobrowsing-test-utils | Affected
| Fixed in– |
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Description
The npm package cobrowsing-test-utils version 35.3.4 contains malicious code that executes a full-host dropper upon being required. It reconstructs obfuscated hostnames at runtime to evade detection, downloads a platform-specific native binary from suspicious domains, writes it to temporary directories, sets executable permissions, and executes it detached from the main process. The downloaded binary is unrelated to the package's stated purpose, and no integrity checks or version pinning are performed. The package also includes a companion telemetry module that uses similar suspicious techniques under the guise of analytics SDK functionality.