{"id":"GHSA-9cmh-xcqm-5hqr","summary":"n8n: Cross-Tenant Module-Cache Poisoning in the JS Task Runner","details":"## Impact\n\nn8n's JavaScript task runner shared one module cache across all users' Code-node executions, so a user able to run a Code node could poison a cached module and alter other users' Code-node executions on the same runner, affecting their confidentiality, integrity, or availability.\n\nThis is a cross-user isolation break within a single n8n instance. It does not constitute a sandbox escape or remote code execution. All multi-user n8n instances running the JS task runner with built-in or external modules enabled are affected.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.67, 2.31.5, and 2.32.1. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Disable built-in and external module access in Code nodes by unsetting `NODE_FUNCTION_ALLOW_BUILTIN` and `NODE_FUNCTION_ALLOW_EXTERNAL`, which removes the poisonable module surface.\n- Use the external runner mode with a dedicated runner per user or project if your deployment supports it.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","aliases":["CVE-2026-72764"],"modified":"2026-08-12T04:26:14.307552297Z","published":"2026-07-22T23:18:39Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-07-22T23:18:39Z","nvd_published_at":null,"cwe_ids":["CWE-20"],"severity":"MODERATE"},"references":[{"type":"WEB","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-9cmh-xcqm-5hqr"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.67"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.31.5"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.32.1"}],"affected":[{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.123.67"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-9cmh-xcqm-5hqr/GHSA-9cmh-xcqm-5hqr.json"}},{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.32.0"},{"fixed":"2.32.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-9cmh-xcqm-5hqr/GHSA-9cmh-xcqm-5hqr.json"}},{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.0-rc.0"},{"fixed":"2.31.5"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-9cmh-xcqm-5hqr/GHSA-9cmh-xcqm-5hqr.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H"}]}