What’s Vulnerable › Vulnerabilities
CVE-2026-6542: Monitor API allows cross-user read of transaction logs and deletion of build data via flow_id
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-30 · updated 2026-10-26
- Weakness: CWE-639
Description
IBM Langflow OSS 1.0.0 through 1.8.4 could allow any user to supply a flow_id to read transaction logs and vertex build data belonging to other users, and to delete persisted vertex build data for another user's flow.
Affected products
- IBM Langflow OSS: from 1.0.0 before 1.9.0 — fixed in 1.9.0
How to fix
Upgrade to a fixed version: IBM Langflow OSS 1.9.0. Check the vendor advisory for mitigations.
References
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