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9.8

IBM Langflow OSS lets remote attacker run code

CVE-2026-104339 · published 4 days ago
Summary

Versions 1.0.0 through 1.12.3 of IBM Langflow OSS can be tricked into running any command an attacker sends over the network. This could let an outsider take control of the server hosting the software. Apply the latest updates from IBM as soon as possible to close the gap.

What to do
  • Update langflow langflow to version 1.12.4 or later.
Affected software
VendorProductAffected versions
ibm langflow oss <= 1.12.3
langflow langflow >= 1.0.0, < 1.12.4
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*
Original advisory text
Langflow OSS is affected by multiple vulnerabilities
IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker full control
Severity
9.8 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-94Code Injection
Timeline
Published29 Oct 2026
Updated30 Oct 2026
First seen29 Oct 2026
Sources
CVE-2026-104339 · NVD
CVE-2026-104339 · MITRE
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