{"answers":{"affected":"1 open source package ship an affected version, including @servicetitan/startup-jest.","exploited":"There is no known exploitation of MAL-2026-11924 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-2026-11924 is a malicious package in @servicetitan/startup-jest, published on 4 Aug 2026."},"fix_prompt":"MAL-2026-11924 is a malicious package: @servicetitan/startup-jest (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-2026-11924/ (Markdown: https://insights.sbomify.com/MAL-2026-11924/index.md)","id":"MAL-2026-11924","markdown":"https://insights.sbomify.com/MAL-2026-11924/index.md","name":"MAL-2026-11924","record":{"aliases":["GHSA-2w9r-jxr5-frfq"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"npm/@servicetitan/startup-jest 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\nThe package's preinstall hook (scripts.preinstall = \"node setup.mjs\") downloads the Bun runtime (v1.3.13) from the oven-sh releases, extracts it to a temporary directory, chmods it executable, and then invokes it against a locally-shipped 727KB obfuscated file math_init.js (execFileSync(bun, [path.join(D,'math_init.js')])). math_init.js is a single-line 727KB body using a string-array rotation cipher (function WV8StW rotating a large mixed-type constant array n7gIxM) with hex-mangled identifiers and no readable strings; the filename does not correspond to any math API surface. The package's declared purpose is a Jest startup helper (main./dist/index.js is a 532-byte re-export of./jest, peer-depends on @servicetitan/startup) — a Jest helper has no functional need to fetch a second language runtime at install time in order to execute a large obfuscated sibling file. Using an alternate runtime (Bun) to execute the obfuscated payload also evades Node-focused install-time inspection. The combination of a lifecycle-triggered alternate-runtime launcher, a heavily obfuscated 727KB payload with a deceptive filename, and a purpose mismatch with the advertised @servicetitan/startup-jest scope is consistent with a supply-chain compromise / dropper release.\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/startup-jest (npm)","id":"MAL-2026-11924","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/startup-jest","purl":"pkg:npm/%40servicetitan/startup-jest","source":"MAL-2026-11924"}],"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-2026-11924/"}