{"answers":{"affected":"1 open source package ship an affected version, including twork-data-services-proxy-prime-api-v1-account-overdraft-info.","exploited":"There is no known exploitation of MAL-2026-12299 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-2026-12299 is a malicious package in twork-data-services-proxy-prime-api-v1-account-overdraft-info, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12299 is a malicious package: twork-data-services-proxy-prime-api-v1-account-overdraft-info (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-2026-12299/ (Markdown: https://insights.sbomify.com/MAL-2026-12299/index.md)","id":"MAL-2026-12299","markdown":"https://insights.sbomify.com/MAL-2026-12299/index.md","name":"MAL-2026-12299","record":{"aliases":["GHSA-crw8-m6mj-q6qp"],"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 this package, index.js loads _adapter.js which selects a platform-specific asset path (/pkg/package, /pkg/package.exe, /pkg/loader_mac, /pkg/package-arm64) and fetches an opaque native executable over HTTPS from hostnames reconstructed at runtime via array-join fragments (oob-worker.cf*-*.workers.dev), with a DNS TXT chunked-base64 fallback under *.dl.well1.site. The downloaded bytes are written to /var/tmp/.cache_\u003crand\u003e or %TEMP%/dotnet_diag_\u003crand\u003e.exe, chmod'd 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Network destinations and sensitive API names (child_process, chmodSync) are assembled from split string fragments to evade static grepping. A second unreferenced dropper implementation in lib/telemetry.js (self-described 'Analytics SDK', 81KB) mirrors the same primitives at larger scale (cp.spawn('/bin/sh', ['-c', filePath+' \u0026'], {detached:true}), fs['chmod'+'Sync'], base64 chunk decoding). The fetched payload host is unrelated to any stated package purpose, is mutable and anonymously-hosted, and delivers arbitrary native code that runs with the installer's privileges on every require.\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 twork-data-services-proxy-prime-api-v1-account-overdraft-info (npm)","id":"MAL-2026-12299","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":"twork-data-services-proxy-prime-api-v1-account-overdraft-info","purl":"pkg:npm/twork-data-services-proxy-prime-api-v1-account-overdraft-info","source":"MAL-2026-12299"}],"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-2026-12299/"}