{"answers":{"affected":"1 open source package ship an affected version, including bigops-storio-schematics.","exploited":"There is no known exploitation of MAL-2026-13255 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-2026-13255 is a malicious package in bigops-storio-schematics, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13255 is a malicious package: bigops-storio-schematics (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-2026-13255/ (Markdown: https://insights.sbomify.com/MAL-2026-13255/index.md)","id":"MAL-2026-13255","markdown":"https://insights.sbomify.com/MAL-2026-13255/index.md","name":"MAL-2026-13255","record":{"aliases":["GHSA-fv5m-hw6g-r9h3"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"index.js unconditionally requires _runtime.js, whose top-level start() function selects a platform-specific asset path, fetches an opaque binary from string-array-obfuscated hostnames reconstructed at runtime (oob-worker.cf1-03-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to a hidden file under /tmp or %TEMP% with a random suffix (e.g..cache_\u003chex\u003e or dotnet_diag_\u003chex\u003e.exe), chmods it to 0755, and spawns it detached via /bin/sh -c or cmd /c start /b. A fallback covert channel resolves c.\u003cdomain\u003e TXT records for a chunk count, then fetches \u003ci\u003e.\u003cdomain\u003e TXT records from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru and base64-decodes the concatenation into the executable payload, bypassing HTTP egress filtering. No hash or signature verification is performed and the destination is not the publisher. A sibling file lib/telemetry.js under an 'analytics-sdk' cover story ships the same download→base64-decode→chmod 0755→sh -c file \u0026 chain as a staged alternate payload. Requiring or installing this package causes attacker-controlled native code to run on the installer's machine.\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 bigops-storio-schematics (npm)","id":"MAL-2026-13255","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":"bigops-storio-schematics","purl":"pkg:npm/bigops-storio-schematics","source":"MAL-2026-13255"}],"products":null,"published":"2026-08-05","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-2026-13255/"}