CVE-2026-110849 n8n before 1.123.83, 2.41.4, and 2.42.1 Stored XSS via Binary-Data File Preview
An attacker can execute arbitrary scripts in the victim's browser via stored XSS in the file preview, potentially taking over their account.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-110849?
CVE-2026-110849 is a high-severity cross-site scripting vulnerability in n8n-io n8n, published on 14 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
n8n before 1.123.83, 2.41.4, and 2.42.1 contains a stored cross-site scripting vulnerability in the file-preview modal, which re-publishes binary data as an unsandboxed same-origin blob URL. A member who uploads a crafted item can run script in the n8n origin of whoever previews it, typically the owner, and act with their session.
Weakness: CWE-79
Which versions are affected by CVE-2026-110849?
How do I fix CVE-2026-110849?
No fix has been published for CVE-2026-110849 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-110849 being exploited?
There is no known exploitation of CVE-2026-110849 in the wild and no public exploit code.
Sources
Also known as GHSA-29xw-66fq-4xc3, GHSA-m7pg-rcp8-66vv.