Critical
Langflow has Remote Code Execution in CSV Agent
Type: advisorySources: OSV
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes `allow_dangerous_code=True`, which automatically exposes LangChain’s Python REPL tool (`python_repl_ast`). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE). Version 1.8.0 fixes the issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-27966
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 19:10 UTC · Revision 1
Source evidence
Langflow has Remote Code Execution in CSV Agent
core-osv · Original sourcePublished 26 Feb 2026, 01:55 UTC
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes `allow_dangerous_code=True`, which automatically exposes LangChain’s Python REPL tool (`python_repl_ast`). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE). Version 1.8.0 fixes the issue.
osv:CVE-2026-27966
Complete source record
{
"id": "4fb6938f45a9230d916058378e06012b84a169c7f125b70273f6f15f0733060e",
"url": "https://osv.dev/vulnerability/CVE-2026-27966",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Langflow has Remote Code Execution in CSV Agent",
"summary": "Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes `allow_dangerous_code=True`, which automatically exposes LangChain’s Python REPL tool (`python_repl_ast`). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE). Version 1.8.0 fixes the issue.",
"evidence": "osv:CVE-2026-27966",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-27966",
"aliases": [
"CVE-2026-27966",
"GHSA-3645-fxcv-hqr4",
"PYSEC-2026-376"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/langflow-ai/langflow",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "af039ee7bd2366ebf6a739ed8e26657e8a2fc1a3"
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{
"fixed": "d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508"
}
],
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"range": [
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{
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"source": "CPE_RANGE"
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{
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"source": "REFERENCES_COMMIT"
}
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}
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27966.json"
}
}
],
"modified": "2026-10-28T02:30:22.617056308Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27966.json",
"https://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27966",
"https://github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508"
],
"provider_metadata": {
"cwe_ids": [
"CWE-94"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27966.json"
}
},
"related_cves": [
{
"value": "CVE-2026-27966",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 489000,
"published_at": "2026-02-26T01:55:18.58+00:00"
}