CVE-2026-65591
highn8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler.
Vendor / product: N8n — n8n
n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.
CVSS
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-07-22 12:18
Modified: 2026-10-29 19:17
NVD status: Analyzed
Last synced 11 hours ago
Verified against the source API 2026-10-29 19:22 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
n8n / n8n <1.123.64, ≥2.0.0 <2.29.8, 2.30.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-29 19:22 UTC · record ↗