CVE-2026-18904: Langflow

High severity, CVSS 8.2. EPSS: 0.3% chance of exploitation in the next 30 days.

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers.

Affected products

• Langflow Langflow: from 1.0.0, before 1.11.2 (fixed in 1.11.2)

Published 2026-08-28. Last modified 2026-08-31.