{"answers":{"affected":"1 open source package ship an affected version, including checkout-subscription-holder.","exploited":"There is no known exploitation of MAL-2026-12594 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-2026-12594 is a malicious package in checkout-subscription-holder, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12594 is a malicious package: checkout-subscription-holder (npm). 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-2026-12594/ (Markdown: https://insights.sbomify.com/MAL-2026-12594/index.md)","id":"MAL-2026-12594","markdown":"https://insights.sbomify.com/MAL-2026-12594/index.md","name":"MAL-2026-12594","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require() of the package, index.js loads _bootstrap.js inside a try/catch. _bootstrap.js reconstructs its download hosts via array.join(\"\") string-splitting (assembling oob-worker.cf{101-adf,99-9b3,103-070,102-baf}.workers.dev and a *.dl.wel1.ru DNS-TXT base64 fallback resolver), downloads a platform-specific opaque binary, writes it to /var/tmp/.cache_\u003chex\u003e on POSIX or TEMP\\dotnet_diag_\u003chex\u003e.exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Filenames are chosen to masquerade as a dotnet diagnostic tool or generic cache, and a /tmp/.analytics_state marker gates re-execution. The advertised package purpose (\"subscription holder\") has no connection to the fetched-and-executed binary, and the destination hosts are string-split constants rather than a documented, publisher-owned domain.","ecosystems":["npm"],"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 checkout-subscription-holder (npm)","id":"MAL-2026-12594","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":[],"last_affected":[],"package":"checkout-subscription-holder","purl":"pkg:npm/checkout-subscription-holder","source":"MAL-2026-12594"}],"products":null,"published":"2026-08-05","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-2026-12594/"}