CVE-2026-48520 Langflow: Unauthenticated Shareable Playground arbitrary local or S3 file read
Attackers can read arbitrary local or S3 files by manipulating file paths in public Langflow playground executions.
- 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-2026-48520?
CVE-2026-48520 is a medium-severity path traversal 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 1.10.0, 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.
Weakness: CWE-73
Which versions are affected by CVE-2026-48520?
3 open source packages ship an affected version, including langflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
langflow PyPI | All versions | 1.10.0 |
langflow PyPI | All versions | 1.10.0 |
langflow PyPI | All versions | 1.10.0 |
Products include Langflow Langflow.
How do I fix CVE-2026-48520?
Upgrade langflow to 1.10.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-48520 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48520 exists.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-rcjh-r59h-gq37, PYSEC-2026-244.