{"items":[{"id":"NVI-00009717","kind":"supply_chain_event","title":"Malicious code in css-nesting-transform (npm)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3p4f-rhj3-crjv"],"plain_summary":"GitHub lists this malware advisory for css-nesting-transform. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-39f303da80a24990bf0d747d08f1b184"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-39f303da80a24990bf0d747d08f1b184","url":"https://github.com/advisories/GHSA-3p4f-rhj3-crjv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3p4f-rhj3-crjv","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:53.250Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-39f303da80a24990bf0d747d08f1b184"],"technology":"css-nesting-transform","known_exclusions":[],"conditions_summary":"css-nesting-transform@1.0.0 was published to npm on 2026-10-07 01:32 UTC by user brahimhamidi (the same account that published css-flow-render-shim@1.0.0 on 2026-10-06). It is described as a CSS polyfill but contains none: index.js is an empty module (byte-identical to the index.js of css-jptvix-polyfill@1.0.0) and payload.min.css is 29 bytes. payload.bundle.min.js carries the payload and runs at require time as a top-level IIFE; it first deletes its own require.cache entries so that it runs again on every require. Module names, commands and URLs are encoded as numeric arrays and decoded at runtime.\n\nBehavior: (1) obtains child_process to execute system commands; (2) runs whoami, id and uname -a with execSync and sends each output, together with os.hostname() and the tag vector=registryLibrariesTopology, to https://webhook.site/69bcd627-1871-4dda-b880-83b37ceac418 through both fetch and https.get; (3) sends a beacon tagged topology-rce-v7 with the Node version, platform, process id and timestamp; (4) exports Proxy objects under Wix-internal module names (thunderboltRegistry, siteAssetsRegistry, documentManagementRegistry, editorRegistry, corvidRegistry, dataBindingRegistry, autoCom","public_affected_ranges":["= 1.0.0"]}],"null_published_at":"2026-10-31T22:13:39.930Z","source_updated_at":"2026-10-12T06:31:33.000Z","source_disclosed_at":"2026-10-12T06:31:27.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T22:06:53.250Z"}],"next_cursor":null,"snapshot_revision":"42594"}