High severity · published Aug 13, 2026
CVE-2026-73484
Flowise before 3.1.3 Sandbox Escape via Pandas Methods
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
Flowise before 3.1.3 contains a sandbox escape vulnerability in pythonCodeValidator.ts that fails to block native Pandas DataFrame methods like to_csv, to_json, pipe, and query. Authenticated attackers can exploit this to exfiltrate uploaded CSV data or write arbitrary files to the server filesystem.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% 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 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73484
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73484
Exploit
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x58f-9m57-qc4m
Third Party Advisory
https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-via-pandas-methods
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