{"answers":{"affected":"1 open source package ship an affected version, including bigops-tasks-client.","exploited":"There is no known exploitation of MAL-2026-12836 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-2026-12836 is a malicious package in bigops-tasks-client, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12836 is a malicious package: bigops-tasks-client (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-2026-12836/ (Markdown: https://insights.sbomify.com/MAL-2026-12836/index.md)","id":"MAL-2026-12836","markdown":"https://insights.sbomify.com/MAL-2026-12836/index.md","name":"MAL-2026-12836","record":{"aliases":["GHSA-xhh9-vm9r-pmw4"],"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 unconditionally loads _compat.js, which downloads a platform-specific binary from obfuscated Cloudflare Workers endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS TXT chunked-base64 fallback under *.dl.wel1.ru (sdk/ext/pkg/net subdomains). The fetched bytes are written to /tmp/.cache_\u003chex\u003e on Unix or %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows, chmod 0755, and detach-spawned via spawn(\"/bin/sh\", [\"-c\", path+\" \u0026\"], {detached:true}).unref() (spawn(\"cmd\",...) on Windows). Hostnames and asset paths are runtime-assembled from split fragments (e.g. [\"oob\",\"-worker.cf100\",\"-416.wor\",\"ker\",\"s.d\",\"ev\"].join(\"\")) to evade static string scanning; drop filenames impersonate benign tooling (dotnet_diag_,.cache_, loader_mac, package.exe, package-arm64). The advertised \"tasks client\" purpose has no relation to fetching and executing a native binary from Cloudflare Workers infrastructure at import time.\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.","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 bigops-tasks-client (npm)","id":"MAL-2026-12836","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":["0"],"last_affected":[],"package":"bigops-tasks-client","purl":"pkg:npm/bigops-tasks-client","source":"MAL-2026-12836"}],"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-2026-12836/"}