{"answers":{"affected":"1 open source package ship an affected version, including json-schema-inspector.","exploited":"There is no known exploitation of MAL-2026-11138 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-2026-11138 is a malicious package in json-schema-inspector, published on 28 Jul 2026."},"fix_prompt":"MAL-2026-11138 is a malicious package: json-schema-inspector (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-2026-11138/ (Markdown: https://insights.sbomify.com/MAL-2026-11138/index.md)","id":"MAL-2026-11138","markdown":"https://insights.sbomify.com/MAL-2026-11138/index.md","name":"MAL-2026-11138","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package advertises itself as a JSON/XML schema validator, but both public entry points (validateJson, validateXml in lib/core.js) invoke a trigger() routine that performs remote code execution against the installer's host. The C2 URL is stored as XOR-encoded hex (key 0x55) and decodes to a manifest hosted at https://cdn.jsdelivr.net/gh/cryptonomad411/cool-utils/package.json. The manifest supplies per-platform payload URLs (wurl/lrurl/laurl/mrurl/maurl) selected by process.platform and process.arch. lib/core.js then spawns node -e (Windows) or sh -c (Linux/macOS) at lines 97 and 114 to execute AES-256-CBC-decrypted staging scripts (aesDecrypt with a statically-derived key) that run the fetched payload. Execution is gated by sandbox-evasion checks in isEnvironment() (os.uptime() \u003e= 300s, os.cpus().length \u003e= 2, os.totalmem() \u003e= 2GB) and a one-shot lock file at ~/.cache/.\u003chostname\u003e.lock (or %APPDATA%\\.cache\\.\u003chostname\u003e.lock) so the dropper runs once per victim. The combined obfuscation of the C2 URL and staging scripts, the sandbox-evasion gating, the per-host persistence marker, and the mismatch between advertised purpose (schema validation) and shipped behavior (attacker-controlled code execution) together confirm hostile intent.","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 json-schema-inspector (npm)","id":"MAL-2026-11138","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":"json-schema-inspector","purl":"pkg:npm/json-schema-inspector","source":"MAL-2026-11138"}],"products":null,"published":"2026-07-28","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-2026-11138/"}