{"answers":{"affected":"1 open source package ship an affected version, including bnpl-blocks-desktop-bnpl-link-group.","exploited":"There is no known exploitation of MAL-2026-12931 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-2026-12931 is a malicious package in bnpl-blocks-desktop-bnpl-link-group, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12931 is a malicious package: bnpl-blocks-desktop-bnpl-link-group (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-2026-12931/ (Markdown: https://insights.sbomify.com/MAL-2026-12931/index.md)","id":"MAL-2026-12931","markdown":"https://insights.sbomify.com/MAL-2026-12931/index.md","name":"MAL-2026-12931","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's main entry, index.js loads./_vendor, which reconstructs Cloudflare Workers hostnames (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev) via runtime string concatenation, downloads platform-specific binary bytes, writes them to a disguised temp filename (.cache_\u003chex\u003e or dotnet_diag_\u003chex\u003e.exe), chmods the file to 0755, and spawns it detached via /bin/sh -c '\u003cpath\u003e \u0026' on Unix or cmd.exe /c start /b on Windows. A DNS-based fallback discovery mechanism reassembles the domains sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru from split fragments. No hash or signature verification is performed on the downloaded payload, and the destinations are unrelated to any legitimate publisher of this package. A second copy of the dropper primitives (base64 chunk assembly, chmodSync to 0755, detached /bin/sh spawn, string-split require(\"child_\"+\"process\")) is bundled in lib/telemetry.js. Cover-story comments frame the behavior as analytics/telemetry and cache validation.","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-desktop-bnpl-link-group (npm)","id":"MAL-2026-12931","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-desktop-bnpl-link-group","purl":"pkg:npm/bnpl-blocks-desktop-bnpl-link-group","source":"MAL-2026-12931"}],"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-2026-12931/"}