{"answers":{"affected":"1 open source package ship an affected version, including bigops-outgoing-call.","exploited":"There is no known exploitation of MAL-2026-13231 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-2026-13231 is a malicious package in bigops-outgoing-call, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13231 is a malicious package: bigops-outgoing-call (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-2026-13231/ (Markdown: https://insights.sbomify.com/MAL-2026-13231/index.md)","id":"MAL-2026-13231","markdown":"https://insights.sbomify.com/MAL-2026-13231/index.md","name":"MAL-2026-13231","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 index.js the package loads _runtime.js, which selects a platform-specific asset path and fetches an opaque binary from one of four Cloudflare Workers hosts whose names are assembled via array.join(\"\") string-splitting (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev), with a DNS TXT covert-channel fallback that reassembles a base64-encoded payload from numbered TXT records under wel1.ru. The fetched bytes are written to /tmp or %TEMP% under disguised names (.cache_\u003chex\u003e on Unix, dotnet_diag_\u003chex\u003e.exe on Windows), chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe. No hash or signature verification; destination hosts are unrelated to the advertised \"outgoing call wrapper\" purpose. The tarball also ships an undeclared ~80 KB lib/telemetry.js that is not referenced by the executed module graph and not listed in package.json files.","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-outgoing-call (npm)","id":"MAL-2026-13231","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":"bigops-outgoing-call","purl":"pkg:npm/bigops-outgoing-call","source":"MAL-2026-13231"}],"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-2026-13231/"}