CVE-2026-72769
published 2026-08-11CVE-2026-72769: n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit…
PriorityP345high8.1CVSS 3.1
AVNACLPRLUINSUCNIHAH
EPSS
0.51%
41.4th percentile
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the main n8n process (a sandbox escape), leading to a denial of service. Both self-hosted and cloud instances running the VM expression engine are affected.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| n8n-io | n8n | < 1.123.67 | 1.123.67 |
| n8n-io | n8n | < 2.32.1 | 2.32.1 |
| n8n-io | n8n | < 2.31.5 | 2.31.5 |
| n8n | n8n | < 1.123.67 | 1.123.67 |
| n8n | n8n | — | — |
| n8n | n8n | >= 2.0.0 < 2.31.5 | 2.31.5 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
nvdv4.06.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
n8n-io n8n prior 1.123.67/2.31.5/2.32.1 VM expression engine prototype pollution
vuldb·2026-09-11·CVSS 6.1
CVE-2026-72769 [MEDIUM] n8n-io n8n prior 1.123.67/2.31.5/2.32.1 VM expression engine prototype pollution
A vulnerability was found in n8n-io n8n. It has been declared as critical. This impacts an unknown function of the component VM expression engine. Such manipulation leads to improperly controlled modification of object prototype attributes.
This vulnerability is referenced as CVE-2026-72769. It is possible to launch the attack remotely. No exploit is available.
It is recommended to upgrade the affected component.
GHSA
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine.
ghsa_unreviewed·2026-08-11
CVE-2026-72769 [MEDIUM] CWE-1321 n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine.
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the main n8n process (a sandbox escape), leading to a denial of service. Both self-hosted and cloud instances running the VM expression engine are affected.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-11
Published