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Servers and applications

CVE-2026-126387

n8n before 2.46.1 Arbitrary File Read via Browser Use browser_upload Tool

Severity
Medium 6.0
Published
13 Nov 2026
Last changed
13 Nov 2026
Added to UpHeron
13 Nov 2026
Fixed in
2.45.5, 2.46.1, 3.0.1
Weakness
CWE-36
Attack
Over the network · Only under certain conditions · Needs a user account · No user action needed
Attacker can
Read data
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Sources
CVE Program

Description

n8n before 2.46.1 contains an arbitrary file read vulnerability that allows authenticated members to read server files by supplying absolute paths to the Browser Use browser_upload tool. Attackers with a connected remote browser session can have Playwright read files such as instance configuration from the n8n server and retrieve their contents from the page.

From the CVE Program.

Affected software

SoftwareAffected versions
n8nServers and applications · cna:n8n-io|n8n
  • Every version before 2.45.5
  • From 2.46.0 before 2.46.1
  • From 3.0.0 before 3.0.1

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-126387