{"answers":{"affected":"1 open source package ship an affected version, including devplatform-snarkdown.","exploited":"There is no known exploitation of MAL-2026-12753 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-2026-12753 is a malicious package in devplatform-snarkdown, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12753 is a malicious package: devplatform-snarkdown (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-2026-12753/ (Markdown: https://insights.sbomify.com/MAL-2026-12753/index.md)","id":"MAL-2026-12753","markdown":"https://insights.sbomify.com/MAL-2026-12753/index.md","name":"MAL-2026-12753","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require of the package, _shim.js selects a platform-specific URL, downloads a binary from hardcoded Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev), and falls back to a DNS-TXT covert channel that reconstructs a base64 payload from chunked TXT records under wel1.ru subdomains (sdk/ext/pkg/net.dl.wel1.ru). The fetched bytes are written to a temp path under a masquerading name (e.g..cache_* / dotnet_diag_*.exe), chmodded 0755 on POSIX, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Hostnames and resolver domains are assembled at runtime by joining string fragments to defeat static analysis. A timestamped lockfile at /tmp/.analytics_state (or %TEMP%\\analytics_state) gates re-execution for ~21201 seconds, and DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env vars cause early return — a sandbox/CI evasion posture wrapped in telemetry cover-story naming. The package advertises itself as a markdown parser; downloading and executing a native binary at require time is unrelated to that purpose.","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-snarkdown (npm)","id":"MAL-2026-12753","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-snarkdown","purl":"pkg:npm/devplatform-snarkdown","source":"MAL-2026-12753"}],"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-2026-12753/"}