{"answers":{"affected":"2 open source packages ship an affected version, including bramin.","exploited":"There is no known exploitation of MAL-2026-5280 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-2026-5280 is a malicious package in bramin, published on 6 Jun 2026."},"fix_prompt":"MAL-2026-5280 is a malicious package: bramin (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-2026-5280/ (Markdown: https://insights.sbomify.com/MAL-2026-5280/index.md)","id":"MAL-2026-5280","markdown":"https://insights.sbomify.com/MAL-2026-5280/index.md","name":"MAL-2026-5280","record":{"aliases":["PYSEC-2026-578"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"bramin ships a `bramin-setup.pth` file that Python auto-executes at every interpreter startup (system-wide, not only when bramin is imported). The.pth contains a single-line obfuscated payload using single-letter aliases (_O, _T, _G, _o, _s, _u, _p, _y, _b, _z, _zf) that, on first run, downloads the Bun JavaScript runtime from `https://github.com/oven-sh/bun/releases/download/bun-v1.3.13/bun-\u003cplatform\u003e-\u003carch\u003e.zip`, stages the binary to `/tmp/b/bun`, chmods it executable, and invokes `bun run` against a sibling `_index.js` discovered via `dirname(__file__)` with a glob fallback. A guard file `/tmp/.bun_ran` ensures the dropper fires only once per machine to evade observation. Several signals confirm malicious intent: (1) the package advertises itself only as a 'pipe operator syntax' Python library and has no legitimate need for a JavaScript runtime; (2) `_index.js` is not listed in the wheel's RECORD manifest, meaning the executed JS payload is smuggled in or supplied by a later/sibling drop and is not covered by the distribution's integrity metadata; (3) `__init__.py` declares `__version__ = '0.0.1'` while the dist-info is `0.0.3`, a version-drift fingerprint consistent with an additive-only republish bolting the dropper onto a previously legitimate release; (4) the obfuscation shape (chained `exec()` of a one-line string with aliased imports) has no benign explanation for a.pth file, whose legitimate purpose is sys.path mutation. Installer impact: arbitrary attacker-controlled JavaScript execution on the installer's machine on the very next Python invocation after `pip install bramin`, with the executed bytes (`_index.js`) outside the wheel's signed manifest and therefore mutable by the attacker at any time.\n\nVersions 0.0.2, 0.0.3, 0.0.4 were compromised.\n\nCompromised packages start an obfuscated infostealer. The infostealer is a heavily obfuscated JavaScript code executed using Bun runtime on Python startup. It collectes all kinds of sensitive data, including API keys, credentials to package repositories, cryptocurrency assets, password manager data. Infostealer actively queries online services to collect additional secrets as well as attempts to gain persistence and spread further by publishing infected packages using collected credentials. Data are exfiltrated likely using Github. The code seems to threaten to wipe the user's data if it detects invalid GitHub tokens. Cleanup should be done with caution.\n\nIt seems to be related to the recent Mini Shai Hulud campaign.\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\nCampaign: 2026-06-compr-woodpecker\n\nReasons (based on the campaign):\n\n - compromised-package\n\n - exfiltration-env-variables\n\n - exfiltration-cloud-tokens\n\n - exfiltration-credentials\n\n - abuses-pth\n\n - obfuscation\n\n - infostealer\n\n - The package contains code to detect if it is running in a sandbox environment.\n\n - exfiltration-crypto\n\n - files-exfiltration\n\n - destructive-actions","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 bramin (PyPI)","id":"MAL-2026-5280","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":null,"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":[],"last_affected":[],"package":"bramin","purl":"pkg:pypi/bramin","source":"MAL-2026-5280"},{"ecosystem":"PyPI","fixed":[],"introduced":[],"last_affected":[],"package":"bramin","purl":"pkg:pypi/bramin","source":"PYSEC-2026-578"}],"products":null,"published":"2026-06-06","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-5280/"}