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Advisory record · GHSA-v5ff-9q35-q26f

Langflow: Unauthenticated RCE in Shareable Playgrounds

CVSS 9.6 CriticalCriticalEPSS 0.0078 · 56th percentile

Critical, because:

  • CVSS score 9.6: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 16 Jun 2026, 17:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
langflowPyPI<1.9.21.9.2
Identifiers
GHSA-v5ff-9q35-q26f · CVE-2026-48519 · PYSEC-2026-243
Weakness (CWE)
CWE-94
Tags
Published
16 Jun 2026
Updated
20 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Langflow versions before 1.9.2 are vulnerable to remote code execution through the Shareable Playground feature. An unauthenticated attacker with a shared flow's public link can submit arbitrary Python code in a flow node's code field via the public build route, which the server executes, giving full control of the deployment. Upgrade to Langflow 1.9.2 or later.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.6 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0078, the 56th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:42 UTC First seen by agentprime
  2. 31 Oct 2026, 14:42 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.