{"answers":{"affected":"1 open source package ship an affected version, including dotnet-runtime-base.","exploited":"There is no known exploitation of MAL-2026-10217 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-2026-10217 is a malicious package in dotnet-runtime-base, published on 13 Jul 2026."},"fix_prompt":"MAL-2026-10217 is a malicious package: dotnet-runtime-base (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-2026-10217/ (Markdown: https://insights.sbomify.com/MAL-2026-10217/index.md)","id":"MAL-2026-10217","markdown":"https://insights.sbomify.com/MAL-2026-10217/index.md","name":"MAL-2026-10217","record":{"aliases":["GHSA-9gr8-wg29-9wvv"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package's postinstall lifecycle script (package.json line 7: \"postinstall\": \"node install.js\") runs install.js, which on Windows writes a PowerShell script to %TEMP% and uses WebClient.DownloadFile to fetch https://raw.githubusercontent.com/cphc811-ui/d3d/main/npm-sc-legit.exe from a personal GitHub account unrelated to the package publisher, then launches the executable via powershell.exe with -WindowStyle Hidden -ExecutionPolicy Bypass -NoProfile -NonInteractive. The dropper is gated to skip when process.platform is not 'win32' and when NODE_ENV=='development', evading developer and CI environments. The fetch targets a mutable branch (main) with no hash or signature verification, the binary is staged to a temp path and started hidden, and index.js contains a cover-story comment labelling the postinstall as the hidden payload. Installing this package on Windows causes arbitrary attacker-controlled code to run on the installer's machine.\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 dotnet-runtime-base (npm)","id":"MAL-2026-10217","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":"dotnet-runtime-base","purl":"pkg:npm/dotnet-runtime-base","source":"MAL-2026-10217"}],"products":null,"published":"2026-07-13","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-2026-10217/"}