CVE-2026-126391
n8n before 1.123.89 RCE via Workflow Expression Evaluation Sandbox Escape
n8n before 1.123.89 contains an insufficient isolation vulnerability in workflow expression evaluation that allows authenticated users to escape the sandbox. Attackers with permission to create or modify workflows can craft expressions referencing unexpected JavaScript properties to execute arbitrary code on the n8n host.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| n8n n8n-io n8n
npm |
≥ 0; < 1.123.89 (affected, semver) 1.123.89 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| n8n n8n-io n8n
npm |
≥ 2.46.0; < 2.46.1 (affected, semver) 2.46.1 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| n8n n8n-io n8n
npm |
≥ 2.0.0; < 2.45.5 (affected, semver) 2.45.5 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| n8n n8n-io n8n
npm |
≥ 3.0.0; < 3.0.1 (affected, semver) 3.0.1 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.7 high |
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | CNA: VulnCheck |
| 4.0 / 7.7 high |
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-gx3v-3x3v-f8r5CNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/n8n-before-1.123.89-rce-via-workflow-expression-evaluation-sandbox-escapeCNA: VulnCheck · third-party-advisory
- https://github.com/n8n-io/n8n/security/advisories/GHSA-gx3v-3x3v-f8r5[email protected]
- https://www.vulncheck.com/advisories/n8n-before-1.123.89-rce-via-workflow-expression-evaluation-sandbox-escape[email protected]
For agents and automation
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