{"answers":{"affected":"1 open source package ship an affected version, including claims-policy-details-api-adapters.","exploited":"There is no known exploitation of MAL-2026-12639 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-2026-12639 is a malicious package in claims-policy-details-api-adapters, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12639 is a malicious package: claims-policy-details-api-adapters (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-2026-12639/ (Markdown: https://insights.sbomify.com/MAL-2026-12639/index.md)","id":"MAL-2026-12639","markdown":"https://insights.sbomify.com/MAL-2026-12639/index.md","name":"MAL-2026-12639","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 _loader.js which downloads a platform-specific binary from string-split-obfuscated hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT chunked-base64 fallback channel across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under cover names such as.cache_\u003chex\u003e or dotnet_diag_\u003chex\u003e.exe, chmodded to 0755, and spawned detached via spawn(\"/bin/sh\", [\"-c\", \u003cpath\u003e + \" \u0026\"], {detached:true, stdio:\"ignore\"}). Hostnames are assembled from split arrays (e.g. [\"oob-worker.cf103-070.wo\",\"rke\",\"rs.dev\"].join(\"\")) and no hash or signature verification is performed despite comments referencing SHA-256 integrity. The DNS-TXT retrieval path queries c.\u003cdomain\u003e for a chunk count and N.\u003cdomain\u003e for base64 chunks that are concatenated and decoded to a Buffer, providing a covert channel that bypasses URL/domain egress controls.","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 claims-policy-details-api-adapters (npm)","id":"MAL-2026-12639","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":"claims-policy-details-api-adapters","purl":"pkg:npm/claims-policy-details-api-adapters","source":"MAL-2026-12639"}],"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-2026-12639/"}