Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2026-0770

Langflow Remote Code Execution

Langflow · 1.4.2

Watch CVE-2026-0770 Browse KEV feed
Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
63.0%
First observed
27 Jun 2026
Last observed
30 Sep 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-0770 is an unauthenticated vulnerability affecting Langflow. Langflow exec_globals Inclusion of Functionality from Untrusted Control Sphere Remote Code Execution Vulnerability. This vulnerability allows...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Langflow 1.4.2.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Langflow exec_globals Inclusion of Functionality from Untrusted Control Sphere Remote Code Execution Vulnerability

Langflow exec_globals Inclusion of Functionality from Untrusted Control Sphere Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of the exec_globals parameter provided to the validate endpoint. The issue results from the inclusion of a resource from an untrusted control sphere. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-27325.

Langflow Affected
Langflow
1.4.2
Published
23 Jan 2026
Exploited Since
27 Jun 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

cisa nuclei_scanner

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 21 Jul 2026

Previdian independently recorded this as exploited after first seeing it in honeypot sensors.

Active exploitation observed

Previdian sensor

First observed 27 Jun 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Proof of concept available

GitHub

Recorded 07 Feb 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
All CISA Advisories First 2026-07-21 12:00 UTC
CISA 2026-07-21 14:32 UTC
Previdian Sensors 2026-07-21 15:41 UTC
CVE 2026-07-21 16:01 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

2,501

Attempts observed

295

Unique attacker IPs

44

Attacker countries

AE · AR · AT · AU · AZ · BD · BG · BR · CA · CH · CN · DE · EG · ES · FR · GB · HK · HU · ID · IE · IN · IR · IT · JP · KH · KR · MA · MY · NL · PK · PL · PT · RO · RU · SA · SE · SG · TR · TW · UA · US · VN · XK · ZA

23

Sensors observed

CVE-2026-0770 exploitation attempts over the last 91 days

Daily events observed by Previdian sensors

Updated 09 Oct 2026

3
10
15
11
7
6
13
25
6
5
73
26
106
12
357
89
77
145
96
111
91
91
97
100
90
140
70
2
10
14
25
33
21
3
4
5
3
14
5
2
13
20
2
1
4
6
14
4
72
92
114
8
10
110
17
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
11 Jul 30 Jul 18 Aug 6 Sep 9 Oct

First observed 27 Jun 2026 · Last observed 30 Sep 2026

Pro adds sensor region and window summaries. Enterprise adds raw IPs, paths, User-Agents, and payloads.

Start 14-day Pro trial

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
1
1
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

Previdian virtual patch guidance is available for this CVE.

AWS WAF Cloudflare ModSecurity

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-0770.yaml 01 Jun 2026

Virtual Patch Detail

Compensating WAF rules for this CVE.

Available

Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to Previdian Enterprise users.

Talk to Sales Learn About Virtual Patches

Risk and context

Severity, weaknesses, and research context

CVSS v3.0

9.8 Critical

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

63.0%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Inclusion of Functionality from Untrusted Control Sphere CWE-829

Recent mention · All CISA Advisories

CISA Adds Four Known Exploited Vulnerabilities to Catalog

CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2021-27137 DD-WRT Stack-Based Buffer Overflow Vulnerability CVE-2026-0770 Langflow Inclusion of Functionality from Untrusted Control...

Read full advisory

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Langflow < 1.3.0 - Remote Code Execution via validate_code() exec()

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 16:38 UTC

    Virtual patch available

    Compensating WAF rule available to block exploitation

  2. 16:01 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  3. 14:32 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  4. 12:00 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  5. 10:18 UTC

    Indicators of compromise added (308)

    Indicators of compromise recorded

  6. 10:18 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  7. 14:21 UTC

    Public PoC available

    Public proof-of-concept code published

  8. 15:34 UTC

    Nuclei template available

    Scanner coverage available

  9. 03:28 UTC

    CVE published

    Vulnerability disclosed publicly

  10. 22:50 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-0770

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-0770",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.63013,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 2501, "sensors": 23 }
}