Remote Code Execution Vulnerability in IBM Langflow OSS
CVE-2026-12944

9.6CRITICAL

Key Information:

Vendor

IBM
Status
Langflow Oss
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-12944?

IBM Langflow OSS versions 1.0.0 to 1.10.0 are susceptible to a vulnerability allowing attackers to execute arbitrary Python code with root privileges on the Langflow server. This can be achieved through the submission of components containing socket or urllib imports. The consequences of this vulnerability include unauthorized access to AWS credentials via IMDSv1 SSRF and the potential for arbitrary file exfiltration from the container filesystem, facilitating lateral movement to internal services like PostgreSQL and Redis within the Docker network. Additionally, a misleading security signal is returned by the scanner, indicating a false sense of security.

Affected Version(s)

Langflow OSS 1.0.0 <= 1.10.0

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-2026-12944
Created by cflowsec

References

https://www.ibm.com/support/pages/node/7278919
vendor-advisorypatch

CVSS V3.1

Score:
9.6
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

CVE-2026-12944 was reported to IBM by KIM MINJUN (GitHub: 31n6).
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