CVE-2026-48519Public exploitNetwork attack vectorHinoki check available

Unauthenticated code execution via public flow payload

Published Jun 23, 2026 · Updated Jun 23, 2026

Code injection in Langflow OSS before 1.9.2 allows remote attackers to execute arbitrary Python through a shared public flow. The /api/v1/build_public_tmp route accepts attacker-controlled data.nodes[X].data.node.template.code.value and instantiates it as a custom component. A flow owner must first enable Shareable Playground and share a flow; the resulting public link exposes the Langflow process without authentication.

CVSS severity9.6
Critical
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Code injection in Langflow OSS before 1.9.2 allows remote attackers to execute arbitrary Python through a shared public flow. The /api/v1/build_public_tmp route accepts attacker-controlled data.nodes[X].data.node.template.code.value and instantiates it as a custom component. A flow owner must first enable Shareable Playground and share a flow; the resulting public link exposes the Langflow process without authentication.

The record

CVE
CVE-2026-48519
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
OpenBMC Project
Product
Langflow OSS
Classifications
CWE-94, T1059.006, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenBMC Project · Langflow OSSversion=< 1.9.2

Published CVSS scores

9.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Python
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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