{"answers":{"affected":"1 open source package ship an affected version, including wagmi_util.","exploited":"There is no known exploitation of MAL-2026-6347 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-2026-6347 is a malicious package in wagmi_util, published on 23 Jun 2026."},"fix_prompt":"MAL-2026-6347 is a malicious package: wagmi_util (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-2026-6347/ (Markdown: https://insights.sbomify.com/MAL-2026-6347/index.md)","id":"MAL-2026-6347","markdown":"https://insights.sbomify.com/MAL-2026-6347/index.md","name":"MAL-2026-6347","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"Package `wagmi_util` impersonates the popular `wagmi` package: it copies wagmi's tagline (\"React Hooks for Ethereum\"), re-exports wagmi's full React-hooks public API (WagmiProvider, useConnect, useWalletClient, useSignMessage, useSendTransaction, useWriteContract, etc.), and links to wagmi.sh in JSDoc — while being published by an unrelated author with no legitimate `wagmi_util` package existing under the wevm namespace. The package.json declares a runtime dependency on `sync-external@1.6.2`, but no source file in the package imports `sync-external`; every internal use of `useSyncExternalStoreWithSelector` imports the legitimate `use-sync-external-store/shim/with-selector.js` instead. Installing `wagmi_util` therefore silently pulls `sync-external@1.6.2` into the installer's dependency tree even though the wrapper's own code never loads it. The wrapper itself is clean re-exports of wagmi; the attack surface is the unused-but-pinned transitive, which a developer choosing a wagmi-adjacent utility would not expect to receive.","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 wagmi_util (npm)","id":"MAL-2026-6347","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":"wagmi_util","purl":"pkg:npm/wagmi_util","source":"MAL-2026-6347"}],"products":null,"published":"2026-06-23","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-2026-6347/"}