{"items":[{"id":"NVI-00011095","kind":"supply_chain_event","title":"Malicious code in postcss-gap-fallback-util (npm)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-35rh-mx8g-vj6f"],"plain_summary":"GitHub lists this malware advisory for postcss-gap-fallback-util. 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-c93dba6709c0d05153a3740aa6fc82ac"],"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-c93dba6709c0d05153a3740aa6fc82ac","url":"https://github.com/advisories/GHSA-35rh-mx8g-vj6f","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-35rh-mx8g-vj6f","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:24.290Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-c93dba6709c0d05153a3740aa6fc82ac"],"technology":"postcss-gap-fallback-util","known_exclusions":[],"conditions_summary":"## Source: amazon-inspector (5b54d5bd893bc377a77503059998e01ae3e338fd4d8ddac6fe2d7c71a3157cb5)\nThe package is published as a PostCSS gap fallback utility but ships thunderboltRegistry.js, which executes an IIFE on module load. The IIFE runs whoami, id, and hostname via child_process.execSync, curls the AWS instance metadata service at http://169.254.169.254/latest/meta-data/ for IAM role, instance-id, availability zone, and local IPv4, and sends the results to https://webhook.site/0492a36c-4d7b-408a-865c-226db25987ba along with DNS beacons to a host under oast.live. A registry-manifest.min.json maps multiple Wix-internal registry names (thunderboltRegistry, siteAssetsRegistry, documentManagementRegistry, editorRegistry, corvidRegistry, dataBindingRegistry, thunderboltBuilderRegistry, thunderboltPreviewRegistry) to the same exfiltration file, and the module exports a Proxy returning no-op registry methods as a façade. The naming, manifest, and façade indicate a dependency-confusion payload targeting Wix build infrastructure; on any installer that requires one of the impersonated module names, shell identity, hostname, and (on EC2) AWS IAM role credentials/metadata are leaked to an a","public_affected_ranges":["= 1.0.0"]}],"null_published_at":"2026-10-31T23:18:22.431Z","source_updated_at":"2026-10-05T00:30:41.000Z","source_disclosed_at":"2026-10-05T00:30:38.000Z","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":"2026-10-31T23:13:24.290Z"}],"next_cursor":null,"snapshot_revision":"42594"}