Remote Code Execution Vulnerability in Langflow by Root
CVE-2026-0770

9.8CRITICAL

Key Information:

Vendor

Langflow

Status
Langflow
Vendor
CVE Published:
23 January 2026

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 10%🦅 CISA Reported📰 News Worthy

What is CVE-2026-0770?

A vulnerability exists in Langflow that allows remote attackers to execute arbitrary code without authentication. The flaw is rooted in the improper handling of the exec_globals parameter at the validate endpoint, resulting in the dynamic inclusion of resources from untrusted sources. Attackers can exploit this vulnerability to execute commands within the context of the root user, posing a significant risk to the integrity and security of affected systems. Further information on this vulnerability can be found in the advisory ZDI-26-036.

CISA has reported CVE-2026-0770

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2026-0770 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace as recent news articles suggest the vulnerability is being used by ransomware groups.

The CISA's recommendation is: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Affected Version(s)

Langflow 1.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-0770-PoC
Created by affix

CVE-2026-0770
Created by 0xgh057r3c0n

CVE-2026-0770
Created by diamorphine666

News Articles

favicon imageBleepingComputer

CISA orders urgent action on actively exploited Langflow RCE flaw

The Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday ordered U.S. government agencies to prioritize patching an actively exploited vulnerability in the Langflow visual framework for building AI agents.

9 hours ago

References

https://www.zerodayinitiative.com/advisories/ZDI-26-036/
x_research-advisory

EPSS Score

10% chance of being exploited in the next 30 days.

CVSS V3.0

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 💰

    Used in Ransomware

  • 📰

    First article discovered by BleepingComputer

  • 🦅

    CISA Reported

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.