CVE-2026-10547 Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement
Authenticated users can inject arbitrary graph data into shared caches, leading to unauthorized workflow execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10547?
CVE-2026-10547 is a medium-severity missing authorization vulnerability in Langflow Langflow, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-284
Which versions are affected by CVE-2026-10547?
It affects 1 product.
Products include Langflow Langflow.
How do I fix CVE-2026-10547?
No fix has been published for CVE-2026-10547 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-10547 being exploited?
There is no known exploitation of CVE-2026-10547 in the wild and no public exploit code.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-f7wm-r5v3-mxr4.