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.
Affected products
langflow: langflow
References1
- www.ibm.com/support/pages/node/7293016 Vendor AdvisoryPatch
Metrics
- CVSS 3.1
-
8.3
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L - EPSS — exploit probability
- 0% percentile: 23 · as of 10 November 2026
- CWE
- CWE-639
Could this be exploited in your environment?
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