CVE-2026-48520: Langflow: Unauthenticated Shareable Playground arbitrary local or S3 file read

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-06-23 · updated 2026-10-26
Weakness: CWE-73

Description

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.10.0, the "Shareable Playground" (or "Public Flows" in code) contains a potential arbitrary file-read vulnerability, depending on the exact flow configuration used. By making a flow public, public execution of the flow is allowed. The execution request can contain a list of files that gets read by Langflow and fed into the LLM. The files path can be any path supported by the storage - it can be either a local file or S3 path if supported by the local configuration This vulnerability is fixed in 1.10.0.

Affected products

IBM Langflow OSS: before 1.10.0 — fixed in 1.10.0

How to fix

Upgrade to a fixed version: IBM Langflow OSS 1.10.0. Check the vendor advisory for mitigations.

References

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