CVE-2026-18891

High

Description

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary flows and access sensitive information due to improper authentication.

SeverityHigh

CVSS8.2

Exploit probability—

Product

Langflow

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-287Improper authentication

How to fix

Update

langflow langflow1.11.2 or later

Patches

ibm.com/support/pages/node/7284579

Affected products

Product	Affected versions	Fixed in
langflow langflow	1.0.0 ≤ v < 1.11.2	1.11.2

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