CVE-2026-13448Network attack vector

Unauthenticated code execution via incomplete component denylist

Published Jul 17, 2026 · Updated Jul 17, 2026

Code injection in IBM Langflow OSS 1.0.0 through 1.10.1 allows remote attackers to execute code through the public flow build endpoint. The validate_public_flow_no_code_execution() function uses an incomplete denylist that permits OpenDsStarAgent, CodeActAgentSmolagents, and CSVAgent components capable of executing code. A public flow and its identifier must be available; successful exploitation runs attacker-selected code with the service process's privileges.

CVSS severity8.1
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in IBM Langflow OSS 1.0.0 through 1.10.1 allows remote attackers to execute code through the public flow build endpoint. The validate_public_flow_no_code_execution() function uses an incomplete denylist that permits OpenDsStarAgent, CodeActAgentSmolagents, and CSVAgent components capable of executing code. A public flow and its identifier must be available; successful exploitation runs attacker-selected code with the service process's privileges.

The record

CVE
CVE-2026-13448
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-184, T1190, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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=1.0.0 <=1.10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.10.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1IBMCVSS:3.1/AV:N/AC:H/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-184Incomplete List of Disallowed Inputs
T1190Exploit Public-Facing Application
T1059.006Python

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

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Your stack

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