my-ctf-helper-script-9921 (npm) · Malicious Code
Affects my-ctf-helper-script-9921Source GCVE Database
Malicious package : remove my-ctf-helper-script-9921 and rotate any secrets on hosts that installed it.
Data as of 26 Oct 2026, 16:20 UTC
Malicious package
Published to npm · OSV MAL-2026-16365
What to do
Remove my-ctf-helper-script-9921 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 |
|---|---|---|
| npmmy-ctf-helper-script-9921 | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
The npm package 'my-ctf-helper-script-9921' version 1.0.0 contains malicious code that, upon being imported or required, executes a fetch request to a hardcoded third-party webhook URL. This request appends the user's document.cookie value as a query parameter, effectively exfiltrating cookie data to an unauthorized external service. The package has no legitimate functionality other than this data exfiltration behavior.