CVE-2026-12944criticalCWE-918

CVE-2026-12944: critical vulnerability in IBM Langflow OSS

Incomplete Security Scanner Blocklist Enables Network-Based Code Execution

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.6epss 0.4%
from disclosure to weapon1 day
Published on NVDSep 14
1st PoC+1d
IBM Langflow OSS 1.0.0 through 1.10.0 can allow attackers to execute arbitrary Python code with root privileges (UID=0) on the Langflow server by submitting components containing socket or urllib imports. This enables: (1) AWS credential theft via IMDSv1 SSRF with full IAM role permissions, (2) arbitrary file exfiltration from the container filesystem, and (3) lateral movement to internal services (PostgreSQL, Redis) within the Docker network. The scanner incorrectly returns "validated": true, providing a false security signal.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Affected products
IBM · Langflow OSS
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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