{"answers":{"affected":"1 open source package ship an affected version, including bnpl-blocks-mobile-bnpl-header.","exploited":"There is no known exploitation of MAL-2026-12991 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-2026-12991 is a malicious package in bnpl-blocks-mobile-bnpl-header, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12991 is a malicious package: bnpl-blocks-mobile-bnpl-header (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-2026-12991/ (Markdown: https://insights.sbomify.com/MAL-2026-12991/index.md)","id":"MAL-2026-12991","markdown":"https://insights.sbomify.com/MAL-2026-12991/index.md","name":"MAL-2026-12991","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 _bridge.js which fetches an OS-specific binary from hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-over-TXT base64 fallback to *.wel1.ru. The retrieved bytes are written to a hidden path in /var/tmp or %TEMP% under masquerading names (.cache_\u003crand\u003e on Unix, dotnet_diag_\u003crand\u003e.exe on Windows), chmodded to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. Destination hostnames are reconstructed at runtime from split string fragments joined with.join(\"\"), and the drop is gated by DISABLE_TELEMETRY / DO_NOT_TRACK environment checks to present as opt-out telemetry. A freshness marker is written to /tmp/.analytics_state. The package presents itself as a mobile BNPL SDK; none of the fetch-write-execute behavior relates to that stated purpose.","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-mobile-bnpl-header (npm)","id":"MAL-2026-12991","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-mobile-bnpl-header","purl":"pkg:npm/bnpl-blocks-mobile-bnpl-header","source":"MAL-2026-12991"}],"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-2026-12991/"}