Vulnerabilities

Vulnerability · MAL-2026-17705

Malicious code in css-overscroll-contain (npm)

Published Oct 8, 2026 · catalog updated Oct 26, 2026 · Malicious code in css-overscroll-contain

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for MAL-2026-17705. A missing EPSS score is not a low risk. Compare Malicious code in css-overscroll-contain with the linked advisory before you change production.

Severity

Unknown—

Known exploitation

Not in CISA/VulnCheck KEV

EPSS

Awaiting synchronization with FIRST

Remediation

Advisory link

Affected products

npm css-overscroll-contain

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (5d978121f021eb6136e6a34db790556ba757de3bb8fa81981903445baf025d16) The package advertises itself as a CSS overscroll-behavior utility but its shipped modules (thunderboltRegistry.js and sibling files named after Wix-internal registries such as siteAssetsRegistry, editorRegistry, corvidRegistry) run a self-executing IIFE at module load that performs host reconnaissance and bulk credential theft. The IIFE uses child_process.execSync and https.get/fetch to collect host identity (uname, hostname/id), file descriptors, /proc/self/mountinfo, network/DNS data, process environment variables matched by the pattern (KEY|TOKEN|SECRET|AUTH|...), and the Kubernetes service-account token at /var/run/secrets/kubernetes.io/serviceaccount/token, posting each result to the hardcoded endpoint https://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The same load-time code probes container-escape primitives via unshare --user --mount with devtmpfs/cgroup/release_agent mounts and a perl memfd_create+exec sequence, and ships a registry-manifest.min.json that points at static.parastorage.com/unpkg/css-overscroll-contain@1.0.1/ so the package resolves inside Wix thunderbolt build infrastructure. The declared package purpose, the Wix-internal export names, the attacker endpoint, and the credential-grade data flow are all incompatible with a legitimate CSS utility. ## Source: ghsa-malware (c440f21513c5906401313e514337afb37c7fcc30ca12f9e9ca4e7b3badb714af) 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.