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A critical vulnerability has been discovered in Langflow, a popular low-code tool used for building applications with Large Language Models (LLMs). The flaw, tracked as CVE-2026-27966, resides in the software’s CSV Agent node and could a…
A critical vulnerability has been discovered in Langflow, a popular low-code tool used for building applications with Large Language Models (LLMs). The flaw, tracked as CVE-2026-27966, resides in the software’s CSV Agent node and could allow malicious actors to execute…
The post Langflow CSV Agent Flaw Could Let Attackers Execute Arbitrary Code appeared first on IT Security News.
title: Detect Exploitation - Langflow CSV Agent Flaw Could Let Attackers Execute Arbitrary Code
id: da68d0dd-be66-4e2b-935a-c4b968f624e5
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "Langflow CSV Agent Flaw Could " ascii wide
condition:
any of them
}index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("Langflow CSV Agent Flaw Could Let Attack")
| stats count earliest(_time) as first_seen latest(_time) as last_seen by src_ip, dest_ip, dest_host, signature
| eval first_seen=strftime(first_seen, "%Y-%m-%d %H:%M:%S"), last_seen=strftime(last_seen, "%Y-%m-%d %H:%M:%S")
| sort - countmessage: "*Langflow CSV Agent Flaw Could Let Attack*"CommonSecurityLog
| where Message has "Langflow CSV Agent Flaw Could Let Attack"
| summarize EventCount = count(), FirstSeen = min(TimeGenerated), LastSeen = max(TimeGenerated) by SourceIP, DestinationIP, DestinationPort, Activity
| extend DetectionRule = "iShareStuff-CTI-Compiled"
| sort by EventCount desc#!/usr/sbin/nft -f
# ISS-ZeroTrust Quarantine Policy for CVE-2026-27966
table inet iss_quarantine {
chain inbound_lockdown {
type filter hook input priority -10; policy drop;
# Allow established connections & loopback
ct state established,related accept
iif "lo" accept
# Whitelist SOC / Bastion Management Subnet
ip saddr 10.0.0.0/8 accept
ip saddr 192.168.1.0/24 accept
# Explicitly log & drop vulnerable service traffic
tcp dport 443 log prefix "[ISS-QUARANTINE-CVE-2026-27966] " drop
}
}apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: quarantine-CVE-2026-27966
namespace: production
labels:
security.isharestuff.com/quarantine: "true"
cve.mitigation/id: "CVE-2026-27966"
spec:
podSelector:
matchLabels:
app.kubernetes.io/vulnerable-cve: "CVE-2026-27966"
policyTypes:
- Ingress
- Egress
ingress:
# Restrict ingress solely to authorized security scanners & bastion pods
- from:
- namespaceSelector:
matchLabels:
kubernetes.io/metadata.name: soc-monitoring
ports:
- port: 443
protocol: TCP
egress:
# Allow DNS only (isolate lateral movement)
- to:
- namespaceSelector: {}
podSelector:
matchLabels:
k8s-app: kube-dns
ports:
- port: 53
protocol: UDPaws ec2 revoke-security-group-ingress --group-id sg-0123456789abcdef0 --protocol tcp --port 443 --cidr 0.0.0.0/0
(http.request.uri.path contains "CVE-2026-27966" or http.request.body.mime contains "exploit" or cf.threat_score gt 20)
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich Langflow CSV Agent Flaw Could Let Attack.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
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