Vulnerability · Published Aug 28, 2026 · Assigned by ibm

CVE-2026-19295Langflow is affected by multiple remote code execution vulnerabilities due to insufficient code-execution policy enforcement

Critical 9.9

In plain English

A critical-severity security flaw in Langflow OSS from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 75% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code.

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)1.6%top 24.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling2Metasploit, Public PoC

Official description

IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from "authenticated flow user" to arbitrary OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.

Affected products (as reported)

Vendor	Product	Versions
IBM	Langflow OSS	1.0.0 – through 1.11.1

Weakness: CWE-95 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://www.ibm.com/support/pages/node/7284733 vendor-advisory, patch