Critical severity · published Sep 14, 2026
CVE-2026-12944
Incomplete Security Scanner Blocklist Enables Network-Based Code Execution
9.6
CVSS
0.4%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LO
Langflow OSS · IBM
1.0.0 through 1.10.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12944
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12944
www.ibm.com
https://www.ibm.com/support/pages/node/7278919
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