CVE-2026-12763

Medium

Description

IBM Langflow OSS 1.0.0 through 1.11.5 could allow an authenticated attacker to access another user's MCP server context due to improper cache key isolation in the MCP Tools component.

SeverityMedium

CVSS4.2

Exploit probability—

Product

Langflow

PublishedSep 14, 2026

First seenSep 14, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

langflow langflow1.11.6 or later

Patches

ibm.com/support/pages/node/7286662

Affected products

Product	Affected versions	Fixed in
langflow langflow	1.0.0 ≤ v < 1.11.6	1.11.6

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