CVE-2026-54306
published 2026-06-23CVE-2026-54306: n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, a prototype pollution vulnerability allowed a crafted public webhook payload to…
PriorityP339medium6.4CVSS 3.1
AVNACLPRLUINSCCLILAN
EPSS
0.26%
17.1th percentile
n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, a prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes. Where a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy — targeting unintended records or issuing outbound requests using the workflow owner's configured credentials. This vulnerability is fixed in 2.25.7 and 2.26.2.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| n8n-io | n8n | < 2.25.7 | 2.25.7 |
| n8n-io | n8n | — | — |
| n8n | n8n | < 2.25.7 | 2.25.7 |
| n8n | n8n | >= 0 < 2.25.7 | 2.25.7 |
| n8n | n8n | >= 2.26.0 < 2.26.2 | 2.26.2 |
| n8n | n8n | >= 2.26.0 < 2.26.2 | 2.26.2 |
CVSS provenance
nvdv3.16.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
nvdv4.06.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/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 up to 2.25.6/2.26.1 Public prototype pollution (GHSA-2vff-hj5x-8gq7)
vuldb·2026-06-24·CVSS 6.3
CVE-2026-54306 [MEDIUM] n8n-io n8n up to 2.25.6/2.26.1 Public prototype pollution (GHSA-2vff-hj5x-8gq7)
A vulnerability classified as critical was found in n8n-io n8n up to 2.25.6/2.26.1. Affected is an unknown function of the component Public Handler. The manipulation results in improperly controlled modification of object prototype attributes.
This vulnerability is identified as CVE-2026-54306. The attack can be executed remotely. There is not any exploit available.
Upgrading the affected component is advised.
GHSA
n8n: Prototype Pollution enables confused-deputy execution via public webhooks
ghsa·2026-06-16
CVE-2026-54306 [MEDIUM] CWE-1321 n8n: Prototype Pollution enables confused-deputy execution via public webhooks
n8n: Prototype Pollution enables confused-deputy execution via public webhooks
## Impact
A prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes.
Where a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy — targeting unintended records or issuing outbound requests using the workflow owner's configured credentials.
## Patches
The issue has been fixed in n8n versions 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.
## Workarounds
If up
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-23
Published