CVE-2026-85025Network attack vector

Unauthenticated code execution via unguarded public MCP endpoints

Published Sep 10, 2026 · Updated Sep 10, 2026

Incorrect authorization in IBM Langflow OSS 1.0.0 through 1.11.5 allows remote attackers to execute code through public MCP endpoints. Publicly shared MCP project transports and public flows containing MCP Tools components omit the code-execution guard and session namespace scoping used by other anonymous execution paths. An unauthenticated network request to a publicly shared project is sufficient to run code as the service process and read or alter chat sessions.

CVSS severity9.8
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect authorization in IBM Langflow OSS 1.0.0 through 1.11.5 allows remote attackers to execute code through public MCP endpoints. Publicly shared MCP project transports and public flows containing MCP Tools components omit the code-execution guard and session namespace scoping used by other anonymous execution paths. An unauthenticated network request to a publicly shared project is sufficient to run code as the service process and read or alter chat sessions.

The record

CVE
CVE-2026-85025
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-863, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.0.0 <=1.11.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.11.5

Published CVSS scores

9.8IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo