Vulnerability · Published Jun 23, 2026 · Assigned by GitHub_M

CVE-2026-48519Langflow: Unauthenticated RCE in Shareable Playgrounds

Critical 9.6

In plain English

A critical-severity code injection in langflow from langflow-ai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)0.8%top 43.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	langflow	1.9.2	GHSA-v5ff-9q35-q26f
PyPI	langflow	1.9.2	PYSEC-2026-243

Affected products (as reported)

Vendor	Product	Versions
langflow-ai	langflow	< 1.9.2

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

https://github.com/langflow-ai/langflow/security/advisories/GHSA-v5ff-9q35-q26f x_refsource_CONFIRM