High severity · published Aug 13, 2026
CVE-2026-73486
Flowise before 3.1.3 Code Injection via CSV Agent customReadCSV
8.8
CVSS
0.7%
EPSS
No
On KEV
Description
Flowise before 3.1.3 contains a code injection vulnerability in the CSV Agent node's customReadCSV parameter that allows authenticated attackers to execute arbitrary Python code. The validator uses a static regex blocklist that can be bypassed through obfuscation techniques, enabling attackers to execute code in the unsandboxed pyodide environment with full system access.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flowise · FlowiseAI
before 3.1.3; before 3.1.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73486
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73486
Exploit
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v
Third Party Advisory
https://www.vulncheck.com/advisories/flowise-before-code-injection-via-csv-agent-customreadcsv
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