CVE-2026-10547
Medium
Description
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph data into a shared cache for any flow. This may result in cross-user cache pollution, unauthorized workflow execution, or denial of service.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Langflow
PublishedAug 5, 2026
First seenAug 5, 2026
Weakness typeCWE-284Improper access control
How to fix
Update
- langflow langflow1.11.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| langflow langflow | 1.0.0 ≤ v < 1.11.0 | 1.11.0 |
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