{"id":"CVE-2026-65597","aliases":["GHSA-p3rg-hrf9-w9gj"],"title":"n8n: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview","summary":"n8n: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview","severity":"high","cwe":["CWE-79"],"vendor":"n8n","product":"n8n","ecosystem":"npm","affected":["n8n < 1.123.64","n8n >= 2.30.0, < 2.30.1","n8n >= 2.0.0-rc.0, < 2.29.8"],"patched":["n8n 1.123.64","n8n 2.30.1","n8n 2.29.8"],"published":"2026-07-22","updated":"2026-07-22","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-p3rg-hrf9-w9gj","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-p3rg-hrf9-w9gj"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65597"},{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.64"},{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.29.8"},{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.30.1"},{"url":"https://www.vulncheck.com/advisories/n8n-before-dom-based-xss-via-unsandboxed-iframe"},{"url":"https://github.com/advisories/GHSA-p3rg-hrf9-w9gj"}],"tags":["ghsa","npm"],"ingestedAt":"2026-07-22T18:05:38.525Z","epss":0.00214,"epssPercentile":0.11997,"slug":"CVE-2026-65597","body":"## Overview\n\n## Impact\n\nThe HTML preview renders execution output into an `iframe srcdoc` without `sandbox`, so a sanitizer bypass lets injected script run same-origin as the editor. When a victim opens the preview, it can call authenticated APIs with their session. An account with `global:member` privileges can exploit it.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.64, 2.29.8, and 2.30.1. 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- Set the `N8N_CONTENT_SECURITY_POLICY` environment variable to a policy that blocks inline scripts.\n- Avoid exposing workflows that render externally-controlled input into the HTML node or binary HTML preview to untrusted users.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.\n\n## Affected packages\n\n- `n8n < 1.123.64`\n- `n8n >= 2.30.0, < 2.30.1`\n- `n8n >= 2.0.0-rc.0, < 2.29.8`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `n8n 1.123.64`\n- `n8n 2.30.1`\n- `n8n 2.29.8`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}