github-app-sts-action (npm) · Malicious Code
Affects github-app-sts-actionSource GCVE Database
Malicious package : remove github-app-sts-action and rotate any secrets on hosts that installed it.
Data as of 8 Sep 2026, 04:37 UTC
Malicious package
Published to npm · OSV MAL-2026-12389
What to do
Remove github-app-sts-action 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 |
|---|---|---|
| npmgithub-app-sts-action | Affected
| Fixed in– |
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Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9434f2e4ac17da4d2b9dff0c36ed8b3c5cc3f76882b9898b768e78ba982bbac2) The package declares a preinstall lifecycle hook that runs index.js on `npm install`. index.js collects host identifiers and system files (os.hostname(), os.userInfo(), home directory, DNS servers, /etc/passwd, /etc/hosts, and package.json contents) and POSTs them via HTTPS to the hardcoded subdomain lncqub6t1loht8b887c8hvcjva13ptdi.oastify.com — a Burp Collaborator out-of-band interaction host used for reconnaissance. There is no advertised functional purpose in the package that would justify this data collection; the code path exists solely to transmit installer host and credential-adjacent file contents to an attacker-controlled endpoint. ## Source: ghsa-malware (87310aa13634f4a26c92164452e9ff0c95d3ee5924feb2f6b5c48354d32ee482) 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.