faiss-cpu-avx512

{"modified":"2026-09-14T00:00:00Z","published":"2026-09-14T00:00:00Z","schema_version":"1.7.4","id":"MAL-2026-16203","summary":"Malicious code in faiss-cpu-avx512 (PyPI)","details":"faiss-cpu-avx512@1.9.0 through 1.9.7 on PyPI impersonates faiss-cpu and ships no FAISS code: faiss_cpu_avx512/__init__.py _fetch_native() downloads an xz-compressed binary from https://files.catbox.moe/ (ffoa50.xz in 1.9.0 to 1.9.3, 0oreqo.xz in 1.9.4, vwfr94.xz in 1.9.5, 3l3x0v.xz in 1.9.6, weu5u2.xz in 1.9.7), writes it to ~/.cache/faiss_cpu_avx512/bin/indexwrm with mode 0755 and runs it through subprocess.Popen(start_new_session=True), restarting it every 5 seconds for the life of the process. It triggers on a call to warmup() or start(); nothing runs on install or import, and the ARTIFACT_SHA256 constant is the string PENDING_BUILD so the advertised checksum check never executes. 1.9.0 to 1.9.3 reach the download only on hosts whose nvidia-smi reports compute capability 9 or 10; 1.9.4 onward download on every host and start one worker per GPU, and the code comments describe the binary as carrying a baked-in pool, wallet and relay and renaming its process to a vllm serve command line. We read all eight wheels between 2026-09-11 and 2026-09-14 and did not retrieve or run the binary.","affected":[{"package":{"ecosystem":"PyPI","name":"faiss-cpu-avx512"},"versions":["1.9.0","1.9.1","1.9.2","1.9.3","1.9.4","1.9.5","1.9.6","1.9.7"]}],"references":[{"type":"WEB","url":"https://pkgwarden.com/incidents/faiss-cpu-avx512-pypi-september-2026/"}],"credits":[{"name":"pkgwarden","type":"FINDER","contact":["https://pkgwarden.com"]}],"database_specific":{"iocs":{"files":[{"digests":{"sha256":"6d0f6a6d7aeba0cb59a6ea53847c0c1328a3cb538632433ad85936350a9fc42e"},"note":"_fetch_native() downloads and decompresses the binary; _supervise_one() (1.9.4 to 1.9.7) or _supervise() (1.9.0 to 1.9.3) runs it with Popen and restarts it every 5 seconds","paths":["faiss_cpu_avx512/__init__.py"],"source":"PACKAGE_ARCHIVE"}],"urls":["https://files.catbox.moe/ffoa50.xz","https://files.catbox.moe/0oreqo.xz","https://files.catbox.moe/vwfr94.xz","https://files.catbox.moe/3l3x0v.xz","https://files.catbox.moe/weu5u2.xz"]}}}