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CriticalVulnerabilityCVE-2026-107329updated 29 Oct 2026, 20:04 UTC

IBM Langflow allows remote code execution by logged-in users

A flaw in IBM Langflow, a tool for building AI workflows, lets someone who has a login run their own commands on the server. That can mean taking control of the machine.

Official, 2 sources
SeverityCriticalCVSS 9.9 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

What happened

IBM Langflow OSS versions 1.0.0 through 1.12.4 have improper control of code generation, allowing a remote authenticated attacker to execute arbitrary code.

Why it is dangerous: An attacker with any valid account could run arbitrary code on the server, potentially reading data, changing systems, or moving further into the network. Organizations exposing Langflow to users or the internet are most at risk.

Are you affected?

You are affected if you run IBM Langflow OSS version 1.0.0 through 1.12.4.

IBM Langflow OSS 1.0.0 through 1.12.4

What to do

  1. Check whether your Langflow OSS version is between 1.0.0 and 1.12.4
  2. Restrict who can create or log into Langflow accounts until a fix is applied
  3. Follow IBM's security advisory for the fixed version and upgrade as soon as it is available

Timeline

  1. 29 Oct 2026, 16:17 UTC
    Publicly disclosed
  2. 29 Oct 2026, 16:17 UTC
    Reported by NVD · NVD
  3. 29 Oct 2026, 16:20 UTC
    Picked up by Zero Radar
  4. 29 Oct 2026, 20:04 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-107329 · GHSA-34r7-8gr9-84jp
CVSS
9.9 / 10
EPSS
0.9% chance of exploitation within 30 days
Disclosed
29 Oct 2026, 16:17 UTC
On Zero Radar
29 Oct 2026, 16:20 UTC (3 min after disclosure)
Last change
29 Oct 2026, 20:04 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

IBM Langflow allows remote code execution by logged-in users · Zero Radar