{"answers":{"affected":"1 open source package ship an affected version, including bnpl-blocks-atom-container.","exploited":"There is no known exploitation of MAL-2026-12900 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-2026-12900 is a malicious package in bnpl-blocks-atom-container, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12900 is a malicious package: bnpl-blocks-atom-container (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-2026-12900/ (Markdown: https://insights.sbomify.com/MAL-2026-12900/index.md)","id":"MAL-2026-12900","markdown":"https://insights.sbomify.com/MAL-2026-12900/index.md","name":"MAL-2026-12900","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 bnpl-blocks-atom-container, index.js loads _adapter.js which selects a platform-specific target path, downloads an opaque binary from one of four Cloudflare Workers hosts whose names are reconstructed at runtime from split string fragments (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), writes it to /var/tmp or %TEMP% under cover-story filenames ('dotnet_diag_\u003chex\u003e.exe' on Windows, '.cache_\u003chex\u003e' on Unix), chmods 0755, and spawns it detached via '/bin/sh -c \u003cfp\u003e \u0026' or 'cmd.exe /c start /b \u003cfp\u003e'. A stamp file named '.analytics_state' under /tmp gates re-execution. When HTTPS delivery fails, the loader falls back to a DNS-over-TXT channel against *.dl.wel1.ru (sdk./ext./pkg./net.dl.wel1.ru): it reads a chunk count from a 'c.\u003cdomain\u003e' TXT record, retrieves N indexed base64 TXT records, concatenates and base64-decodes them into the payload bytes, and executes the result. Hostname obfuscation, disguised staging filenames, and a redundant covert DNS delivery channel are consistent with evasion of both static scanners and HTTP egress controls, not with any legitimate SDK loader.","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 bnpl-blocks-atom-container (npm)","id":"MAL-2026-12900","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":"bnpl-blocks-atom-container","purl":"pkg:npm/bnpl-blocks-atom-container","source":"MAL-2026-12900"}],"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-2026-12900/"}