{"answers":{"affected":"1 open source package ship an affected version, including pylogkt.","exploited":"There is no known exploitation of MAL-2026-4291 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-4291 is a malicious package in pylogkt, published on 25 May 2026."},"fix_prompt":"MAL-2026-4291 is a malicious package: pylogkt (PyPI). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-4291/ (Markdown: https://insights.sbomify.com/MAL-2026-4291/index.md)","id":"MAL-2026-4291","markdown":"https://insights.sbomify.com/MAL-2026-4291/index.md","name":"MAL-2026-4291","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package masquerades as a logging utility but every call to its logging API (log.info/debug/etc) triggers Logger._log, which on macOS hosts (paths starting with /Users or /Library) silently spawns a detached subprocess running pylogkt/_check.py. That script self-deletes from disk (os.remove(__file__)), then enters an infinite 60-second polling loop against https://pypkg.dev/project/pylogkt/json with TLS verification disabled (ssl._create_unverified_context()). The first POST exfiltrates the absolute install path (base_dir.encode()), revealing the victim's username and site-packages layout. Subsequent responses are base64-decoded and passed to os.system via `pip show \u003cdata\u003e`; the shell-escape filter allows `;`, `|`, `\u0026`, `(`, `)`, and `\u003e`, making arbitrary command injection trivial. The C2 host pypkg.dev typosquats pypi.org and uses a /project/\u003cpkg\u003e/json path that mimics PyPI's real JSON API to camouflage the traffic. This is a full-fidelity backdoor: persistent C2, self-evidence-deletion, disabled TLS, and remote command execution on the installer's machine.\n\nPackage silently executes remote code during import.\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\nCampaign: 2026-05-lognest\n\nReasons (based on the campaign):\n\n - Downloads and executes a remote malicious script.","ecosystems":["PyPI"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in pylogkt (PyPI)","id":"MAL-2026-4291","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":[],"last_affected":[],"package":"pylogkt","purl":"pkg:pypi/pylogkt","source":"MAL-2026-4291"}],"products":null,"published":"2026-05-25","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-4291/"}