CVE-2026-107366

HighCVSS 8.3/10Last modified Nov 3, 2026

Description

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.

Metrics

CVSS 3.1 8.3/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Weakness enumeration

CWE-639

Affected software

Vendor	Product	Versions
IBM	Langflow OSS	>= 1.0.0, <= 1.12.4

References

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

Timeline

Published: Oct 20, 2026
Last modified: Nov 3, 2026
NVD status: Analyzed

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