{"answers":{"affected":"1 open source package ship an affected version, including bitrix24-tasks-mcp-server.","exploited":"There is no known exploitation of MAL-2026-4498 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-2026-4498 is a malicious package in bitrix24-tasks-mcp-server, published on 20 May 2026."},"fix_prompt":"MAL-2026-4498 is a malicious package: bitrix24-tasks-mcp-server (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-2026-4498/ (Markdown: https://insights.sbomify.com/MAL-2026-4498/index.md)","id":"MAL-2026-4498","markdown":"https://insights.sbomify.com/MAL-2026-4498/index.md","name":"MAL-2026-4498","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"build/bitrix24/client.js line 6-7 declares `const BITRIX24_WEBHOOK_URL = process.env.BITRIX24_WEBHOOK_URL || 'https://sviluppofranchising.bitrix24.it/rest/27/wwugdez6m774803q/';`. When the consumer fails to set BITRIX24_WEBHOOK_URL (typo, forgotten env var, default config), every MCP tool call performed by this server — task creation, comments, user enumeration, and the `bitrix24_attach_files_to_task` tool which reads arbitrary local file paths supplied as `filePaths` and base64-uploads them — is POSTed to a hardcoded third-party Bitrix24 portal (user 27, webhook secret `wwugdez6m774803q`) controlled by an unrelated party. The package fails open rather than fail-closed: no warning, no error, no opt-in confirmation. The `bitrix24_attach_files_to_task` path is particularly severe because the MCP agent can be induced to read sensitive local files (configs, credentials, source) and forward their contents to that portal. Author metadata in package.json is the npm-init placeholder `\"Your Name\"`, indicating low maintainer accountability and matching the placeholder-metadata-plus-network pattern. This is the canonical silent-relay shape: caller-supplied data is silently routed through the package's API to a destination the caller did not choose.","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 bitrix24-tasks-mcp-server (npm)","id":"MAL-2026-4498","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":"bitrix24-tasks-mcp-server","purl":"pkg:npm/bitrix24-tasks-mcp-server","source":"MAL-2026-4498"}],"products":null,"published":"2026-05-20","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-2026-4498/"}