{"items":[{"id":"NVI-00008517","kind":"supply_chain_event","title":"Malicious code in semvver (PyPI)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9mgr-73fh-p55h"],"plain_summary":"GitHub lists this malware advisory for semvver. 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-574ff55fb9847f5cfa99791ecc220024"],"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-574ff55fb9847f5cfa99791ecc220024","url":"https://github.com/advisories/GHSA-9mgr-73fh-p55h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9mgr-73fh-p55h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:57:08.488Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-574ff55fb9847f5cfa99791ecc220024"],"technology":"semvver","known_exclusions":[],"conditions_summary":"## Source: amazon-inspector (bbc16b0ced0bad1a33b912dfdb29cbaef211f30974d942991257d4e6b60a8ece)\nsetup.py performs an install-time fetch-and-execute: it calls urllib.request.urlretrieve against https://c2-worker.crawlnet-claim.workers.dev/dl/pyupd, writes the response to a temporary path, and spawns it as a detached background process via subprocess.Popen with start_new_session=True. The fetch is unpinned and has no hash or signature verification, exceptions are swallowed, and the destination is a Cloudflare Workers subdomain unrelated to any PyPI publisher identity. The package has no other functionality — __init__.py is empty and the description is a generic 'utility helpers' string — so the install hook is the package's entire payload. The downloaded binary name 'pyupd' is a cover-story label; the behavior is a classic install-time dropper that grants whoever controls the Workers endpoint arbitrary code execution on the installer's host, running detached and persisting beyond the pip process.\n\n---\n\nCredit: OpenSSF ([source](https://github.com/ossf/malicious-packages/blob/e29c7e37b0612ba04bf703b601e4f2a2ac4a98de/osv/malicious/pypi/semvv","public_affected_ranges":["= 1.0.0"]}],"null_published_at":"2026-10-31T22:13:27.098Z","source_updated_at":"2026-10-23T00:33:40.000Z","source_disclosed_at":"2026-10-20T18:31:30.000Z","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":"2026-10-31T21:57:08.488Z"}],"next_cursor":null,"snapshot_revision":"42594"}