CVE-2026-48519 Langflow: Unauthenticated RCE in Shareable Playgrounds
Unauthenticated attackers can execute arbitrary Python code via the Shareable Playground feature in Langflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-48519?
CVE-2026-48519 is a critical code injection vulnerability in Langflow Langflow, published on 23 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, the "Shareable Playground" (or "Public Flows" in code) contains a critical RCE vulnerability. Shareable Playground feature works by enabling the execution of workflows by unauthenticated users, by accessing a link. Specifically, it enables the route /api/v1/build_public_tmp to execute any public flow, given a public flow ID. When the route executes the flow, it allows for providing arbitrary custom Python code as the nodes code, inside the JSON payload. The vulnerable field is data.nodes[X].data.node.template.code.value. This vulnerability is fixed in 1.9.2.
Weakness: CWE-94
Which versions are affected by CVE-2026-48519?
3 open source packages ship an affected version, including langflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
langflow PyPI | All versions | 1.9.2 |
langflow PyPI | All versions | 1.9.2 |
langflow PyPI | All versions | 1.9.2 |
Products include Langflow Langflow.
How do I fix CVE-2026-48519?
Upgrade langflow to 1.9.2 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-48519 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48519 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-v5ff-9q35-q26f, PYSEC-2026-243.