CVE-2026-54302Network attack vector

Stored XSS via unsanitized webhook identifier

Published Jun 23, 2026 · Updated Jun 23, 2026

Stored XSS in the n8n Chat Trigger allows remote authenticated users with workflow edit access to execute JavaScript in the n8n origin. The generated chat page places an attacker-controlled webhookId into HTML without neutralizing it, turning a crafted identifier into executable script. Exploitation requires another logged-in user to visit the malicious chat URL; the script then acts with that user's session privileges.

CVSS severity7.0
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the n8n Chat Trigger allows remote authenticated users with workflow edit access to execute JavaScript in the n8n origin. The generated chat page places an attacker-controlled webhookId into HTML without neutralizing it, turning a crafted identifier into executable script. Exploitation requires another logged-in user to visit the malicious chat URL; the script then acts with that user's session privileges.

The record

CVE
CVE-2026-54302
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.123.55
  2. Affected versionversion=>= 2.0.0-rc.0, < 2.25.7
  3. Affected versionversion=>= 2.26.0, < 2.26.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=< 1.123.55; version=>= 2.0.0-rc.0, < 2.25.7; version=>= 2.26.0, < 2.26.2

Published CVSS scores

7.0GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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