{"answers":{"affected":"1 open source package ship an affected version, including path-stream-utils-testmetest.","exploited":"There is no known exploitation of MAL-2026-18333 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-2026-18333 is a malicious package in path-stream-utils-testmetest, published on 26 Oct 2026."},"fix_prompt":"MAL-2026-18333 is a malicious package: path-stream-utils-testmetest (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-2026-18333/ (Markdown: https://insights.sbomify.com/MAL-2026-18333/index.md)","id":"MAL-2026-18333","markdown":"https://insights.sbomify.com/MAL-2026-18333/index.md","name":"MAL-2026-18333","record":{"aliases":["GHSA-7pvr-f92m-6fwg"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package self-describes as a 'Temporary package placeholder for staged publishing' (package.json stub:true, README 'Temporary Holding Version') but ships a Linux addon.node, a Windows.node, and a 6,052,359-byte opaque.napi_cache blob containing no printable strings. package.json defines a postinstall that executes `node -e \"require('./addon.node').init()\"`, and index.js requires and invokes the same init(). On invocation the native addon reads the sibling.napi_cache file (format string '%s/.napi_cache'), writes the bytes to a PID-named hidden file under /tmp (format '/tmp/.%u'), chmods it executable, and detaches a child via fork+setsid+execlp, so the opaque payload runs under the installer's user on npm install and on every require() of the package. Before executing the dropped file the addon enumerates CI and sandbox indicators (GITHUB_ACTIONS, GITLAB_CI, TRAVIS, CIRCLECI, SANDBOX, JENKINS_URL, BUILDKITE, CODEBUILD_BUILD_ID, APPVEYOR, SEMAPHORE, TEAMCITY_VERSION, BITBUCKET_BUILD_NUMBER, NETLIFY, VERCEL, CF_BUILD_ID, SCREWDRIVER), reads /proc/1/cgroup and /proc/1/cmdline for container markers (docker, containerd, kubepod, sandbox, podman), and inspects /proc/self/status for TracerPid, gating execution to non-analysis hosts. The payload bytes themselves are packed/encrypted and not inspectable from the tarball. A placeholder stub has no legitimate reason to ship a native dropper, detach a hidden /tmp child, and evade sandboxes.\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 path-stream-utils-testmetest (npm)","id":"MAL-2026-18333","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":"path-stream-utils-testmetest","purl":"pkg:npm/path-stream-utils-testmetest","source":"MAL-2026-18333"}],"products":null,"published":"2026-10-26","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-2026-18333/"}