CVE-2026-27578Network attack vector

Account takeover via unsanitized workflow page fields

Published Feb 25, 2026 · Updated Feb 25, 2026

Stored XSS in n8n before 1.123.22, 2.0.0 through 2.9.2, and 2.10.0 allows remote authenticated users to hijack visiting accounts. Multiple workflow nodes render attacker-controlled fields into Form, Chat, Send and Wait, or Webhook pages without consistently sanitizing script-capable content. Workflow creation or editing permission is required, and execution occurs when another user visits the crafted page, exposing that user's session to account takeover.

CVSS severity8.5
High
EPSS probability0.18%
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 n8n before 1.123.22, 2.0.0 through 2.9.2, and 2.10.0 allows remote authenticated users to hijack visiting accounts. Multiple workflow nodes render attacker-controlled fields into Form, Chat, Send and Wait, or Webhook pages without consistently sanitizing script-capable content. Workflow creation or editing permission is required, and execution occurs when another user visits the crafted page, exposing that user's session to account takeover.

The record

CVE
CVE-2026-27578
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-80, CWE-79, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 1.123.22
  2. Affected versionversion=>= 2.0.0, < 2.9.3
  3. Affected versionversion=>= 2.10.0, < 2.10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=< 1.123.22; version=>= 2.0.0, < 2.9.3; version=>= 2.10.0, < 2.10.1

Published CVSS scores

8.5GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/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-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

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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