Path traversal in Flowise - #VU129616
Published: May 4, 2026
Vulnerability identifier: #VU129616
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to write arbitrary files.
The vulnerability exists due to improper input validation in the addBase64FilesToStorage function when processing chat flow creation requests containing base64 file data. A remote attacker can supply a crafted chatflow id to write arbitrary files.
Affected software
Flowise
Remediation
Install security update from vendor's website.
Flowise - update to 3.0.6