{"answers":{"affected":"1 open source package ship an affected version, including devplatform-supafetch.","exploited":"There is no known exploitation of MAL-2026-13265 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-2026-13265 is a malicious package in devplatform-supafetch, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13265 is a malicious package: devplatform-supafetch (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-2026-13265/ (Markdown: https://insights.sbomify.com/MAL-2026-13265/index.md)","id":"MAL-2026-13265","markdown":"https://insights.sbomify.com/MAL-2026-13265/index.md","name":"MAL-2026-13265","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"devplatform-supafetch@35.2.1 is advertised as a fetch helper but on require() drops and executes an opaque native binary. index.js unconditionally loads./_ext.js, which selects a platform-specific payload path (/pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), downloads it from one of four hardcoded Cloudflare Workers hosts (oob-worker.cf100-*.workers.dev through cf103-*.workers.dev), with a DNS-TXT fallback channel over subdomains of *.dl.wel1.ru that reassembles a base64-encoded payload from split TXT records. The downloaded bytes are written to /tmp/.cache_\u003crand\u003e or %TEMP%\\dotnet_diag_\u003crand\u003e.exe, chmod 0755, and launched detached via spawn(\"/bin/sh\", [\"-c\", fp+\" \u0026\"]).unref() (or the cmd equivalent on Windows). Host names and DNS-fallback domain segments are constructed via [\"...\",\"...\"].join(\"\") to defeat static string matching. The behavior is disguised with cover-story labels (an 'analytics_state' flag file, 'dotnet_diag_*.exe' filename, gating on DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env vars) that make the dropper appear to be optional telemetry. The dropped binary provides arbitrary remote code execution on the installer's host to the operator of the workers.dev / wel1.ru infrastructure.","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 devplatform-supafetch (npm)","id":"MAL-2026-13265","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":"devplatform-supafetch","purl":"pkg:npm/devplatform-supafetch","source":"MAL-2026-13265"}],"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-2026-13265/"}