Critical
Flowise before 3.1.3 Code Injection via CSV Agent customReadCSV
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-73486
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 08:04 UTC · Revision 1
Source evidence
Flowise before 3.1.3 Code Injection via CSV Agent customReadCSV
core-osv · Original sourcePublished 13 Aug 2026, 11:28 UTC
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.
osv:CVE-2026-73486
Complete source record
{
"id": "2b3b5fcaadb910fc3d888e5cdef6382cecf02ba2d012beb83ed88885ba38419b",
"url": "https://osv.dev/vulnerability/CVE-2026-73486",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Flowise before 3.1.3 Code Injection via CSV Agent customReadCSV",
"summary": "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.",
"evidence": "osv:CVE-2026-73486",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-73486",
"aliases": [
"CVE-2026-73486",
"GHSA-4878-cqgq-j53v"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/flowiseai/flowise",
"type": "GIT",
"events": [
{
"introduced": "0"
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{
"fixed": "09f099dbfda179e439ec677d06ad737375899eef"
}
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"database_specific": {
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{
"range": [
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"introduced": "0"
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{
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}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
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"range": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73486.json"
}
}
],
"modified": "2026-10-28T02:30:26.980927449Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73486.json",
"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v",
"https://nvd.nist.gov/vuln/detail/CVE-2026-73486",
"https://www.vulncheck.com/advisories/flowise-before-code-injection-via-csv-agent-customreadcsv"
],
"provider_metadata": {
"cwe_ids": [
"CWE-94"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73486.json"
}
},
"related_cves": [
{
"value": "CVE-2026-73486",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 493584,
"published_at": "2026-08-13T11:28:06.103+00:00"
}