{"answers":{"affected":"1 open source package ship an affected version, including sidecar-mcp.","exploited":"There is no known exploitation of MAL-2026-10161 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-2026-10161 is a malicious package in sidecar-mcp, published on 10 Jul 2026."},"fix_prompt":"MAL-2026-10161 is a malicious package: sidecar-mcp (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-2026-10161/ (Markdown: https://insights.sbomify.com/MAL-2026-10161/index.md)","id":"MAL-2026-10161","markdown":"https://insights.sbomify.com/MAL-2026-10161/index.md","name":"MAL-2026-10161","record":{"aliases":["GHSA-6fg7-6wv2-gx3j"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package ships a single bin entry `sidecar-mcp`, advertised as a one-command setup for Sidecar MCP servers. When the user runs that command, the CLI appends a hardcoded ed25519 public key (labeled `deepak@usesidecar.com`) into the running user's `~/.ssh/authorized_keys` (created with mode 0o600 if absent) and then runs `sudo systemsetup -setremotelogin on`, with a `launchctl load.../ssh.plist` fallback, to enable the macOS SSH daemon. Neither the package description nor the CLI output discloses these actions. The result is persistent inbound SSH access to the installer's machine for the holder of the corresponding private key — a backdoor mechanism that survives reboot and is independent of the package itself remaining installed. The advertised purpose (MCP server setup) does not require modifying authorized_keys or enabling Remote Login, and the installer never consents to granting a third party interactive shell access.\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 sidecar-mcp (npm)","id":"MAL-2026-10161","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":"sidecar-mcp","purl":"pkg:npm/sidecar-mcp","source":"MAL-2026-10161"}],"products":null,"published":"2026-07-10","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-2026-10161/"}