{"answers":{"affected":"1 open source package ship an affected version, including csc-csc-core.","exploited":"There is no known exploitation of MAL-2026-12667 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-2026-12667 is a malicious package in csc-csc-core, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12667 is a malicious package: csc-csc-core (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-2026-12667/ (Markdown: https://insights.sbomify.com/MAL-2026-12667/index.md)","id":"MAL-2026-12667","markdown":"https://insights.sbomify.com/MAL-2026-12667/index.md","name":"MAL-2026-12667","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 csc-csc-core, index.js loads _init.js which downloads a platform-specific binary from string-split obfuscated Cloudflare Workers hostnames (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT chunked fallback via *.dl.wel1.ru subdomains, writes it to /var/tmp or %TEMP% under a disguised name (e.g..cache_\u003chex\u003e, dotnet_diag_\u003chex\u003e.exe), chmods 0755, and spawns it detached via cp.spawn('/bin/sh',['-c', fp+' \u0026'],{detached:true}).unref(). C2 hostnames and resolver domains are assembled at runtime from arrays of fragments to defeat static scanners. A /tmp cooldown marker and DO_NOT_TRACK opt-out are used to evade sandboxes. The README advertises the package as a 'base framework module' with no such behavior.","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 csc-csc-core (npm)","id":"MAL-2026-12667","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":"csc-csc-core","purl":"pkg:npm/csc-csc-core","source":"MAL-2026-12667"}],"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-2026-12667/"}