{"answers":{"affected":"1 open source package ship an affected version, including @servicetitan/docs-anvil-uikit-contrib.","exploited":"There is no known exploitation of MAL-2026-11853 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-2026-11853 is a malicious package in @servicetitan/docs-anvil-uikit-contrib, published on 4 Aug 2026."},"fix_prompt":"MAL-2026-11853 is a malicious package: @servicetitan/docs-anvil-uikit-contrib (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-2026-11853/ (Markdown: https://insights.sbomify.com/MAL-2026-11853/index.md)","id":"MAL-2026-11853","markdown":"https://insights.sbomify.com/MAL-2026-11853/index.md","name":"MAL-2026-11853","record":{"aliases":["GHSA-h9gm-pg7x-wvrw"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"npm/@servicetitan/docs-anvil-uikit-contrib is affected by the large-scale, self-propagating npm supply-chain worm of 2026-08-04 (the \"Shai-Hulud: Here We Go Again\" wave) — the same campaign that began with the compromise of the keyv and cacheable maintainer account. The listed version(s) were trojanized and republished by the worm after it reached an npm publish token belonging to a maintainer in this namespace; the payload enumerates every package a stolen token controls and republishes each with the same hook, so many packages under this scope were poisoned in the same short window. Every poisoned release adds a preinstall hook (`\"preinstall\": \"node setup.mjs\"`) that runs on a bare `npm install`, before any project code. setup.mjs downloads a standalone Bun runtime and runs a byte-identical, heavily obfuscated ~728 KB second-stage credential stealer (shipped as Math_Symbol.js / math_init.js). It harvests GitHub, npm, AWS, GCP, Azure, HashiCorp Vault and Kubernetes credentials plus generic secrets and private keys (TruffleHog-style sweep), reads CI/CD secrets and identifies build runners, then republishes further packages the stolen token can reach. Rather than a fixed command-and-control host, it exfiltrates stolen findings to attacker-created GitHub repositories (descriptions reading \"Shai-Hulud: Here We Go Again\") and over DNS. Treat any environment that installed an affected version (with install scripts enabled) as compromised: rotate and revoke all reachable credentials (npm and GitHub tokens, cloud keys, Vault/Kubernetes secrets, and CI org/repo secrets). Part of the August 2026 npm worm that poisoned 400+ packages across many organizations.\n\npackage.json declares a preinstall hook `node setup.mjs`. setup.mjs (itself obfuscated with _0x-style identifiers) downloads the Bun runtime from github.com/oven-sh/bun releases into a temp directory, marks it executable, and invokes it against a bundled 727KB math_init.js file that ships in the tarball. math_init.js is heavily obfuscated (Bun-bundled with hex-named globals, a shuffled string/opcode array, and an array-rotate decoder), concealing its actual behavior from static inspection. The package presents itself as Docusaurus documentation for a UI kit and its README only describes a docusaurus/yalc workflow — nothing in the advertised purpose requires fetching an alternate JavaScript runtime at install time to execute an obfuscated sibling payload. The package name and README also mimic legitimate ServiceTitan documentation resources (docs.st.dev, github.com/servicetitan/anvil-uikit-contrib), while the preinstall dropper and bundled Bun executor are absent from any legitimate docs workflow. Fetching a second runtime and running an obfuscated bundle under it at install time is an alternate-runtime dropper pattern that bypasses tooling which only traces Node-resolved code, and grants arbitrary code execution on the installer's machine on `npm install`.\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 @servicetitan/docs-anvil-uikit-contrib (npm)","id":"MAL-2026-11853","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":"@servicetitan/docs-anvil-uikit-contrib","purl":"pkg:npm/%40servicetitan/docs-anvil-uikit-contrib","source":"MAL-2026-11853"}],"products":null,"published":"2026-08-04","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-2026-11853/"}