Eval Injection in Flowise - CVE-2026-69253
Published: July 30, 2026
Vulnerability identifier: #VU140072
CSH Severity: Medium
CVSS v4: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-69253
CWE-ID: CWE-95
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to improper neutralization of directives in dynamically evaluated code in the AgentAsTool node and related JavaScript execution path when handling a crafted baseURL value injected into generated code executed with the insecure vm2 sandbox. A remote user can inject arbitrary JavaScript through the baseURL setting to execute arbitrary code.
Exploitation requires valid access to a Flowise instance and affects code paths that still invoke JavaScript execution with useSandbox set to false.
Affected software
Flowise
How to mitigate CVE-2026-69253
Install security update from vendor's website.
Flowise - update to 3.1.3