High 7.2Published Aug 20, 2026

CVE-2026-77077n8n before 1.123.69 Remote Code Execution via EventEmitter Prototype Pollution

Updated under an hour ago (2026-10-19 08:50 UTC)

Does this affect you?

It affects n8n-io n8n and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for n8n-io n8n

Exploited in the last 30 days

n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain a JavaScript task runner VM sandbox escape. The runner's prototype-freezing routine covers globalThis functions but not internal module constructors such as EventEmitter, allowing an authenticated user with Code node access to exploit prototype pollution to execute arbitrary commands within the runner container. Because the polluted prototype is a process-wide object, the corruption persists across other tenants' Code node executions on the same shared runner. On v1.x instances without task runners enabled, Code node JavaScript runs directly in the main n8n process, where the impact could be higher.

CVSS: 7.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Aug 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n8n-io n8n n8n_io:n8n (from the name)	before 1.123.69; 1.123.69 not affected	CNA record
n8n n8n n8n:n8n	before 1.123.69; from 2.33.0 before 2.33.4; 2.34.0	NVD

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-m3hg-p5r9-fg9hvendor-advisory, mitigation
https://www.vulncheck.com/advisories/n8n-before-remote-code-execution-via-eventemitter-prototype-pollutionthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.