CVE-2026-18891: IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary flows and access sensitive info
Summary
IBM Langflow OSS (an open-source tool for building AI applications) versions 1.0.0 through 1.11.1 has a security flaw where an attacker without proper credentials can run unauthorized workflows and see private data because the system does not properly verify user identity before allowing access.
Vulnerability Details
8.2(high)
EPSS: 0.0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
network
low
none
none
August 28, 2026
Classification
Affected Vendors
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Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-18891
First tracked: August 28, 2026 at 08:08 PM
Classified by LLM (prompt v3) · confidence: 92%