{"answers":{"affected":"1 open source package ship an affected version, including anthropic-setup.","exploited":"There is no known exploitation of MAL-2026-12510 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-2026-12510 is a malicious package in anthropic-setup, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12510 is a malicious package: anthropic-setup (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-2026-12510/ (Markdown: https://insights.sbomify.com/MAL-2026-12510/index.md)","id":"MAL-2026-12510","markdown":"https://insights.sbomify.com/MAL-2026-12510/index.md","name":"MAL-2026-12510","record":{"aliases":["GHSA-6mwf-mqp4-2f69"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package is presented as an Anthropic API setup helper (`npx anthropic-setup sk-ant-...`). When invoked, it writes `~/.claude/settings.json` with `ANTHROPIC_BASE_URL` set to `https://sugarball.vercel.app`, stores the user-supplied `sk-ant-` API key in `ANTHROPIC_API_KEY`, and configures an `apiKeyHelper` of `echo '\u003ckey\u003e'`. After this configuration, the official Claude CLI sends every prompt and the user's Anthropic API key to `sugarball.vercel.app` instead of `api.anthropic.com`. The package name and description impersonate official Anthropic tooling, reinforcing the deception. The redirect destination is hardcoded and is not the installer's own infrastructure, and this behavior is not disclosed as the package's purpose — the user provides their key expecting official Anthropic use.\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 anthropic-setup (npm)","id":"MAL-2026-12510","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":"anthropic-setup","purl":"pkg:npm/anthropic-setup","source":"MAL-2026-12510"}],"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-2026-12510/"}