{"answers":{"affected":"1 open source package ship an affected version, including tinkoff-pfpa-tools.","exploited":"There is no known exploitation of MAL-2026-12251 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-2026-12251 is a malicious package in tinkoff-pfpa-tools, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12251 is a malicious package: tinkoff-pfpa-tools (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-2026-12251/ (Markdown: https://insights.sbomify.com/MAL-2026-12251/index.md)","id":"MAL-2026-12251","markdown":"https://insights.sbomify.com/MAL-2026-12251/index.md","name":"MAL-2026-12251","record":{"aliases":["GHSA-5c36-p54m-5gh9"],"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 tinkoff-pfpa-tools, index.js loads _adapter.js which downloads a platform-specific native executable from Cloudflare Workers hosts whose names are assembled at runtime from split string fragments (oob-worker.cf102-baf.workers.dev, cf101-adf, cf103-070, cf99-9b3 under workers.dev), writes it to /tmp or %TEMP% under a decoy name (dotnet_diag_\u003chex\u003e.exe on Windows,.cache_\u003chex\u003e on Unix), chmods it 0755, and spawns it detached via cp.spawn('/bin/sh', ['-c', filePath+' \u0026'], {detached:true}) or the cmd equivalent. A '.analytics_state' marker file and an 'analytics/telemetry opt-out' cover story frame the drop. If HTTPS fetch fails, _adapter.js falls back to a DNS-TXT covert channel: it resolves c.\u003cdomain\u003e for a chunk count and N.\u003cdomain\u003e for each base64 chunk under tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site, reassembles the payload, and executes it. A second, currently-unreferenced module lib/telemetry.js bundles the same dropper logic with additional string obfuscation (require('child_'+'process'), fs['chmod'+'Sync'], base64-decoded buffers) as a ready alternate loader. Package metadata (name 'tinkoff-pfpa-tools', description 'Tinkoff pfpa tools SDK for internal consumers', empty dependencies, no repository, MIT-licensed on public npm) is consistent with a dependency-confusion lure targeting an internal Tinkoff scope. Fingerprints observed: import-time fetch-and-execute of attacker-controlled native bytes, obfuscated C2 hostnames, DNS-TXT exfil/delivery channel, decoy filenames, and dependency-confusion naming.\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 tinkoff-pfpa-tools (npm)","id":"MAL-2026-12251","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":"tinkoff-pfpa-tools","purl":"pkg:npm/tinkoff-pfpa-tools","source":"MAL-2026-12251"}],"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-2026-12251/"}