CVE-2026-17627

Langflow is affected by improper authorization due to missing access control on the voice-mode WebSocket endpoint

Published Sep 4, 2026 CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Description
IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information and inject messages into workflow history due to improper authorization.

Remediation

Vendor Solution

IBM strongly recommends addressing the vulnerability now by upgrading Langflow OSS to version 1.10.3 https://pypi.org/project/langflow/

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Apple
Apple macos
Langflow
Langflow langflow
Linux
Linux linux Kernel
Microsoft
Microsoft windows
CPEs cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Apple
Apple macos
Langflow
Langflow langflow
Linux
Linux linux Kernel
Microsoft
Microsoft windows
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information and inject messages into workflow history due to improper authorization.
Title Langflow is affected by improper authorization due to missing access control on the voice-mode WebSocket endpoint
First Time appeared Ibm
Ibm langflow Oss
Weaknesses CWE-639
CPEs cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:langflow_oss:1.10.2:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm langflow Oss
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Sep 4, 2026, 5:36 PM
Reserved
Jul 27, 2026, 9:05 PM
Status
Analyzed
Published
Sep 4, 2026, 5:16 PM
Modified
Sep 9, 2026, 3:05 PM