{"answers":{"affected":"1 open source package ship an affected version, including beaver-ui-popover-card.","exploited":"There is no known exploitation of MAL-2026-12821 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-2026-12821 is a malicious package in beaver-ui-popover-card, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12821 is a malicious package: beaver-ui-popover-card (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-2026-12821/ (Markdown: https://insights.sbomify.com/MAL-2026-12821/index.md)","id":"MAL-2026-12821","markdown":"https://insights.sbomify.com/MAL-2026-12821/index.md","name":"MAL-2026-12821","record":{"aliases":["GHSA-w7h2-c396-233r"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require('beaver-ui-popover-card'), _support.js downloads a platform-specific binary from Cloudflare Workers endpoints whose hostnames are assembled at runtime from split string fragments (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT fallback resolver chain across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to a temp path under disguised names (.cache_\u003chex\u003e on Unix, dotnet_diag_\u003chex\u003e.exe on Windows), chmod 0o755, and spawned detached via /bin/sh -c or cmd. No signature or hash verification is performed. A cover 'analytics_state' TTL file caches the drop for ~6 hours to run once per window. A second dropper of the same shape is bundled in lib/telemetry.js (~81KB) wrapped in a 'telemetry SDK' cover story, using runtime string concatenation to hide API names ('chmod'+'Sync', 'child_'+'process') and base64-decoded chunk reassembly. Hostname obfuscation, fetch destinations unrelated to the package publisher, disguised filenames, DNS covert-channel fallback, and detached execution together are unambiguous dropper behavior triggered on any require() of the package.\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 beaver-ui-popover-card (npm)","id":"MAL-2026-12821","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":"beaver-ui-popover-card","purl":"pkg:npm/beaver-ui-popover-card","source":"MAL-2026-12821"}],"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-2026-12821/"}