{"answers":{"affected":"1 open source package ship an affected version, including bs58-12.","exploited":"There is no known exploitation of MAL-2026-13759 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-2026-13759 is a malicious package in bs58-12, published on 11 Aug 2026."},"fix_prompt":"MAL-2026-13759 is a malicious package: bs58-12 (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-2026-13759/ (Markdown: https://insights.sbomify.com/MAL-2026-13759/index.md)","id":"MAL-2026-13759","markdown":"https://insights.sbomify.com/MAL-2026-13759/index.md","name":"MAL-2026-13759","record":{"aliases":["GHSA-x9c8-g63x-mh7q"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"Package bs58-12 presents itself as the popular bs58 base58 library (README copied from bs58, advertising `npm i --save bs58`) but its own code is a thin wrapper: index.js does `require(\"base65-12x\")` and the sole declared runtime dependency is `base65-12x` at ^5.0.1, a name resembling the `base-x` library the real bs58 uses. The package under analysis contains no exfiltration, credential access, install/import-time destructive action, or lifecycle scripts; the only installer-facing behavior is pulling in base65-12x as a dependency. Whether installing bs58-12 causes harm depends on the code shipped by base65-12x, which is a separate package not analyzed here.\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 bs58-12 (npm)","id":"MAL-2026-13759","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":"bs58-12","purl":"pkg:npm/bs58-12","source":"MAL-2026-13759"}],"products":null,"published":"2026-08-11","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-2026-13759/"}