Stored XSS in n8n markdown rendering
CVE-2026-25054 is a stored cross-site scripting vulnerability in n8n, an open source workflow automation platform. Prior to versions 1.123.9 and 2.2.1, n8n's markdown rendering component in the web interface did not safely handle attacker-controlled markdown content in areas such as workflow sticky notes and other markdown-supported UI elements. An authenticated user with permission to create or modify workflows could store malicious markdown payloads in a workflow so that JavaScript executes in the browser of another user when that user views or interacts with the crafted workflow. Because the script runs in the context of the n8n application origin, it executes with same-origin privileges and can access application session context and perform actions as the victim user.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Authenticated stored XSS in n8n markdown rendering (e.g., workflow sticky notes) enabling same-origin script execution and potential session hijack/account takeover.
Stored XSS in n8n markdown rendering (e.g., workflow sticky notes) enabling same-origin script execution against other users and potential session hijack/account takeover.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.