CVE-2026-107366

IBM Langflow OSS 1.0.0 through 1.12.4 contains three message endpoints that perform no ownership verification. Any authenticated user can bulk-delete another user's messages, overwrite message content to inject malicious prompts, or hijack an entire conversation session by reassigning its session ID.

Score

CVSS 3.1 8.3 High

Status

Awaiting Analysis - psirt@us.ibm.com

Published

2026-10-19

Last modified

2026-10-21

Weaknesses

CWE-639

Affected products

• Langflow Oss (Ibm)

References

• https://www.ibm.com/support/pages/node/7293016