---
title: "CVE-2026-48519: Langflow: Unauthenticated RCE in Shareable Playgrounds"
url: https://erroneo.us/security/cve/CVE-2026-48519/
description: "CVE-2026-48519 (langflow (PyPI)): Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, the \"Shareable Playground\"…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-23
date_modified: 2026-07-20
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-48519"
kev: false
cvss: 9.6
epss: 0.00783
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.8% , percentile 55: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 55% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Only applies if your dependency tree includes langflow (PyPI) <= 1.9.1, fixed in 1.9.2 . Check your lockfile, including transitive dependencies.

## What it is

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/buildpublictmp 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

- PyPI `langflow` <= 1.9.1 → fixed: 1.9.2

## Affected products (CVE record)

- langflow-ai langflow: < 1.9.2

## Severity

- GitHub_M CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.78% probability of exploitation activity in the next 30 days; percentile 55.

## Sources

- [GitHub Advisory GHSA-v5ff-9q35-q26f](https://github.com/advisories/GHSA-v5ff-9q35-q26f)
- [CVE.org record CVE-2026-48519](https://www.cve.org/CVERecord?id=CVE-2026-48519)
- [NVD entry CVE-2026-48519](https://nvd.nist.gov/vuln/detail/CVE-2026-48519)
- [github.com](https://github.com/langflow-ai/langflow/security/advisories/GHSA-v5ff-9q35-q26f)
- [github.com](https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-243.yaml)

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Source page: https://erroneo.us/security/cve/CVE-2026-48519/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt