{"id":"GHSA-mxrg-77hm-89hv","summary":"n8n: Prototype Pollution in XML and GSuiteAdmin node parameters lead to RCE","details":"## Impact\nAn authenticated user with permission to create or modify workflows could exploit a prototype pollution vulnerability in the GSuiteAdmin node. By supplying a crafted parameter as part of node configuration, an attacker could write attacker-controlled values onto `Object.prototype`. An attacker could use this prototype pollution to achieve remote code execution on the n8n instance.\n\n## Patches\nThe issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.27. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Limit workflow creation and editing permissions to fully trusted users only.\n- Disable the XML node by adding `n8n-nodes-base.xml` to the `NODES_EXCLUDE` environment variable.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","aliases":["CVE-2026-33696"],"modified":"2026-03-26T16:56:23.041337Z","published":"2026-03-26T16:41:01Z","database_specific":{"github_reviewed_at":"2026-03-26T16:41:01Z","nvd_published_at":"2026-03-25T18:16:32Z","cwe_ids":["CWE-1321"],"severity":"CRITICAL","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-mxrg-77hm-89hv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33696"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"}],"affected":[{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.14.0"},{"fixed":"2.14.1"}]}],"versions":["2.14.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mxrg-77hm-89hv/GHSA-mxrg-77hm-89hv.json"}},{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.0-rc.0"},{"fixed":"2.13.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mxrg-77hm-89hv/GHSA-mxrg-77hm-89hv.json"}},{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.123.27"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mxrg-77hm-89hv/GHSA-mxrg-77hm-89hv.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}]}